forked from extern/shorewall_code
46364902e3
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@5817 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
5700 lines
132 KiB
Bash
Executable File
5700 lines
132 KiB
Bash
Executable File
#!/bin/sh
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#
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# The Shoreline Firewall (Shorewall) Packet Filtering Firewall Compiler - V3.4
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#
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# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
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#
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# (c) 1999,2000,2001,2002,2003,2004,2005,2006,2007 - Tom Eastep (teastep@shorewall.net)
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#
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# Complete documentation is available at http://shorewall.net
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of Version 2 of the GNU General Public License
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# as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
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#
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# If an error occurs while starting or restarting the firewall, the
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# firewall is automatically stopped.
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#
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# Commands are:
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#
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# compile check Verify the configuration files.
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# compile compile <path name> Compile into <path name>
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#
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# Environmental Variables:
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#
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# EXPORT=Yes -e option specified to /sbin/shorewall
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# SHOREWALL_DIR A directory name was passed to /sbin/shorewall
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# VERBOSE Standard Shorewall verbosity control.
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#
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# Fatal error -- stops the compiler after issuing the error message
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#
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fatal_error() # $* = Error Message
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{
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echo " ERROR: $@" >&2
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[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
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[ -n "$OUTPUT" ] && rm -f $OUTPUT
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kill $$
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exit 2
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}
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#
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# We include this for compatibility with the 'firewall' script. That script distinguishes between
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# Fatal Errors (stop or restore required) and Startup Errors (errors detected before the firewall
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# state has been changed. This allows us to use common parsing routines in both programs.
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#
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startup_error()
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{
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echo " ERROR: $@" >&2
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[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
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[ -n "$OUTPUT" ] && rm -f $OUTPUT
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kill $$
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exit 2
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}
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#
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# Write the passed args to the compiler output file.
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#
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save_command()
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{
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[ $# -gt 0 ] && echo "${INDENT}${@}" >&3 || echo >&3
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}
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save_command_unindented()
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{
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echo "${@}" >&3
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}
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#
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# Write a progress_message2 command to the output file.
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#
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save_progress_message()
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{
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echo >&3
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echo "${INDENT}progress_message2 \"$@\"" >&3
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echo >&3
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}
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save_progress_message_short()
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{
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echo "${INDENT}progress_message \"$@\"" >&3
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}
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progress_message_and_save()
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{
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progress_message "$@"
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echo "${INDENT}progress_message \"$@\"" >&3
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}
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#
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# Echo the contents of the passed file indented by $INDENT
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#
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indent() {
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if [ -n "$INDENT" ]; then
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eval sed \'s\/^/"$INDENT"\/\' $1
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else
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cat $1
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fi
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}
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#
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# Echo the contents of the passed file indented by $INDENT while handling line continuation
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#
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indent1() {
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if [ -n "$INDENT" ]; then
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if [ -n "$HAVEAWK" ]; then
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eval awk \''BEGIN { indent=1; }; /^[[:space:]]*$/ { print ""; indent=1; next; }; { if (indent == 1) print "'"$INDENT"'" $0; else print; }; { indent=1; }; /\\$/ { indent=0; };'\' $1
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else
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eval sed \'s\/^/"$INDENT"\/\' $1
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fi
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else
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cat $1
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fi
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}
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#
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# Append a file to the compiler's output with indentation.
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#
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append_file() # $1 = File Name
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{
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local user_exit=$(find_file $1)
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case $user_exit in
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$SHAREDIR/*)
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#
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# Don't copy files from /usr/share/shorewall into the compiled script
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#
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;;
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*)
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if [ -f $user_exit ]; then
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save_progress_message "Processing $user_exit ..."
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indent1 $user_exit >&3
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save_command
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fi
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;;
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esac
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}
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#
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# Generate a command to run iptables
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#
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do_iptables() {
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save_command \$IPTABLES $@
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}
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#
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# Generate an IPTABLES command. Include hacks to work around iptables limitations
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#
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run_iptables() {
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if [ -z "$KLUDGEFREE" ]; then
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#
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# Purge the temporary files that we use to prevent duplicate '-m' specifications
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#
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[ -n "$PHYSDEV_MATCH" ] && [ -f $TMP_DIR/physdev ] && rm -f $TMP_DIR/physdev
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[ -n "$IPRANGE_MATCH" ] && [ -f $TMP_DIR/iprange ] && rm -f $TMP_DIR/iprange
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fi
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save_command "$IPTABLES_COMMAND $@"
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}
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#
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# Version of 'run_iptables' that inserts white space after "!" in the arg list
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#
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run_iptables2() {
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if [ -z "$KLUDGEFREE" ]; then
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#
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# Purge the temporary files that we use to prevent duplicate '-m' specifications
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#
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[ -n "$PHYSDEV_MATCH" ] && [ -f $TMP_DIR/physdev ] && rm -f $TMP_DIR/physdev
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[ -n "$IPRANGE_MATCH" ] && [ -f $TMP_DIR/iprange ] && rm -f $TMP_DIR/iprange
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fi
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save_command run_iptables $(fix_bang $@)
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}
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#
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# Generate command to quietly run iptables
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#
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qt_iptables() {
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if [ -z "$KLUDGEFREE" ]; then
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#
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# Purge the temporary files that we use to prevent duplicate '-m' specifications
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#
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[ -n "$PHYSDEV_MATCH" ] && [ -f $TMP_DIR/physdev ] && rm -f $TMP_DIR/physdev
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[ -n "$IPRANGE_MATCH" ] && [ -f $TMP_DIR/iprange ] && rm -f $TMP_DIR/iprange
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fi
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save_command qt \$IPTABLES $@
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}
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#
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# Generate a command to run tc
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#
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run_tc() {
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save_command run_tc $@
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}
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#
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# Add the implicit ACCEPT rules at the end of a rules file section
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#
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finish_chain_section() # $1 = canonical chain $2 = state list
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{
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local policy policychain
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[ -n "$FASTACCEPT" ] || run_iptables -A $1 -m state --state $2 -j ACCEPT
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if list_search RELATED $(separate_list $2) ; then
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if is_policy_chain $1 ; then
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if eval test -n \"\$${1}_synparams\" ; then
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if [ $SECTION = DONE ]; then
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eval policy=\$${1}_policy
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case $policy in
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ACCEPT|CONTINUE|QUEUE)
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run_iptables -A $1 -p tcp --syn -j @$1
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;;
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esac
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else
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run_iptables -A $1 -p tcp --syn -j @$1
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fi
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fi
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else
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eval policychain=\$${1}_policychain
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if eval test -n \"\$${policychain}_synparams\" ; then
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run_iptables -A $1 -p tcp --syn -j @$policychain
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fi
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fi
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fi
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}
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finish_section() # $1 = Section(s)
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{
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local zone zone1 chain
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for zone in $ZONES $FW; do
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for zone1 in $ZONES $FW; do
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chain=${zone}2${zone1}
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if havechain $chain; then
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finish_chain_section $chain $1
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fi
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done
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done
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}
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#
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# Create a filter chain
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#
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# If the chain isn't one of the common chains then add a rule to the chain
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# allowing packets that are part of an established connection. Create a
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# variable exists_${1} and set its value to Yes to indicate that the chain now
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# exists.
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#
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createchain() # $1 = chain name, $2 = If "yes", do section-end processing
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{
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local c=$(chain_base $1)
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run_iptables -N $1
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if [ $2 = yes ]; then
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case $SECTION in
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NEW|DONE)
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finish_chain_section $1 ESTABLISHED,RELATED
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;;
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RELATED)
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finish_chain_section $1 ESTABLISHED
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;;
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esac
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fi
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eval exists_${c}=Yes
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}
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#
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# This version creates the chain if it doesn't already exist
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#
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createchain2() # $1 = chain name, $2 = If "yes", create default rules
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{
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local c=$(chain_base $1)
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ensurechain $1
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if [ $2 = yes ]; then
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case $SECTION in
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NEW|DONE)
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finish_chain_section $1 ESTABLISHED,RELATED
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;;
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RELATED)
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finish_chain_section $1 ESTABLISHED
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;;
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esac
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fi
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eval exists_${c}=Yes
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}
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#
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# Determine if a chain exists
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#
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# When we create a chain "x", we create a variable named exists_x and
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# set its value to Yes. This function tests for the "exists_" variable
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# corresponding to the passed chain having the value of "Yes".
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#
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havechain() # $1 = name of chain
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{
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local c=$(chain_base $1)
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eval test \"\$exists_${c}\" = Yes
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}
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#
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# Ensure that a chain exists (create it if it doesn't)
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#
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ensurechain() # $1 = chain name
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{
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havechain $1 || createchain $1 yes
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}
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ensurechain1() # $1 = chain name
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{
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havechain $1 || createchain $1 no
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}
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#
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# Add a rule to a chain creating the chain if necessary
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#
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addrule() # $1 = chain name, remainder of arguments specify the rule
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{
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ensurechain $1
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run_iptables -A $@
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}
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addrule2() # $1 = chain name, remainder of arguments specify the rule
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{
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ensurechain $1
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run_iptables2 -A $@
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}
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#
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# Create a mangle chain
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#
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# Create a variable exists_mangle_${1} and set its value to Yes to indicate that
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# the chain now exists.
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#
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createmanglechain() # $1 = chain name
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{
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run_iptables -t mangle -N $1
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eval exists_mangle_${1}=Yes
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}
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#
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# Determine if a mangle chain exists
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#
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# When we create a chain "chain", we create a variable named exists_nat_chain
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# and set its value to Yes. This function tests for the "exists_" variable
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# corresponding to the passed chain having the value of "Yes".
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#
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havemanglechain() # $1 = name of chain
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{
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eval test \"\$exists_mangle_${1}\" = Yes
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}
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#
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# Ensure that a mangle chain exists (create it if it doesn't)
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#
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ensuremanglechain() # $1 = chain name
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{
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havemanglechain $1 || createmanglechain $1
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}
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#
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# Create a nat chain
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#
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# Create a variable exists_nat_${1} and set its value to Yes to indicate that
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# the chain now exists.
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#
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createnatchain() # $1 = chain name
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{
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run_iptables -t nat -N $1
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eval exists_nat_${1}=Yes
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}
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#
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# Determine if a nat chain exists
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#
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# When we create a chain "chain", we create a variable named exists_nat_chain
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# and set its value to Yes. This function tests for the "exists_" variable
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# corresponding to the passed chain having the value of "Yes".
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#
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havenatchain() # $1 = name of chain
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{
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eval test \"\$exists_nat_${1}\" = Yes
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}
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#
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# Ensure that a nat chain exists (create it if it doesn't)
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#
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ensurenatchain() # $1 = chain name
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{
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havenatchain $1 || createnatchain $1
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}
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#
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# Add a rule to a nat chain creating the chain if necessary
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#
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addnatrule() # $1 = chain name, remainder of arguments specify the rule
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{
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ensurenatchain $1
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run_iptables2 -t nat -A $@
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}
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#
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# Create a rule to delete a chain if it exists
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#
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deletechain() # $1 = name of chain
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{
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save_command "qt \$IPTABLES -L $1 -n && qt \$IPTABLES -F $1 && qt \$IPTABLES -X $1"
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}
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#
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# validate the policy file
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#
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validate_policy()
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{
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local clientwild
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local serverwild
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local zone
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local zone1
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local pc
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local chain
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local policy
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local loglevel
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local synparams
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local parents
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local default
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local var
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print_policy() # $1 = source zone, $2 = destination zone
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{
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[ $1 = $2 ] || \
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[ $1 = all ] || \
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[ $2 = all ] || \
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progress_message " Policy for $1 to $2 is $policy using chain $chain"
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}
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for var in DROP_DEFAULT REJECT_DEFAULT ACCEPT_DEFAULT QUEUE_DEFAULT; do
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eval default=\$$var
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case $default in
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none)
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;;
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*)
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if ! list_search $default $USEDACTIONS; then
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if ! list_search $default $DEFAULT_MACROS; then
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if [ ! -f $(find_file macro.$default) ]; then
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fatal_error "Default Action/Macro $var=$default not found"
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fi
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DEFAULT_MACROS="$DEFAULT_MACROS $default"
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fi
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fi
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esac
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done
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ALL_POLICY_CHAINS=
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for zone in $ZONES $FW; do
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chain=${zone}2${zone}
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eval ${chain}_is_policy=Yes
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eval ${chain}_is_optional=Yes
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eval ${chain}_policy=ACCEPT
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eval ${chain}_policychain=$chain
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ALL_POLICY_CHAINS="$ALL_POLICY_CHAINS $chain"
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if [ -n "$IMPLICIT_CONTINUE" ]; then
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eval parents=\$${zone}_parents
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if [ -n "$parents" ]; then
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for zone1 in $ZONES $FW; do
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if [ $zone != $zone1 ]; then
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chain=${zone}2${zone1}
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eval ${chain}_is_policy=Yes
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eval ${chain}_is_optional=Yes
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eval ${chain}_policy=CONTINUE
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eval ${chain}_policychain=$chain
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ALL_POLICY_CHAINS="$ALL_POLICY_CHAINS $chain"
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chain=${zone1}2${zone}
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eval ${chain}_is_policy=Yes
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eval ${chain}_is_optional=Yes
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eval ${chain}_policy=CONTINUE
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eval ${chain}_policychain=$chain
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ALL_POLICY_CHAINS="$ALL_POLICY_CHAINS $chain"
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fi
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done
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fi
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fi
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done
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while read client server policy loglevel synparams; do
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clientwild=
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serverwild=
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case "$client" in
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all|ALL)
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clientwild=Yes
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;;
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*)
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if ! validate_zone $client; then
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fatal_error "Undefined zone $client"
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fi
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esac
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case "$server" in
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all|ALL)
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serverwild=Yes
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;;
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*)
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if ! validate_zone $server; then
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fatal_error "Undefined zone $server"
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fi
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esac
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default=
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case $policy in
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*:None|*:none)
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default=none
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;;
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*:*)
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default=${policy#*:}
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if list_search $default $ACTIONS; then
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if ! list_search $default $USEDACTIONS; then
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USEDACTIONS="$USEDACTIONS $default"
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fi
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elif ! list_search $default $DEFAULT_MACROS; then
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[ -f $(find_file macro.${default}) ] || fatal_error "$client $server $policy $loglevel $synparams: Default Macro $default not found"
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DEFAULT_MACROS="$DEFAULT_MACROS $default"
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fi
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;;
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*)
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;;
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esac
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case ${policy%:*} in
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DROP)
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[ -n "${default:=$DROP_DEFAULT}" ]
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;;
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REJECT)
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[ -n "${default:=$REJECT_DEFAULT}" ]
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;;
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ACCEPT)
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[ -n "${default:=$ACCEPT_DEFAULT}" ]
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;;
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CONTINUE)
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;;
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QUEUE)
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[ -n "${default:=$QUEUE_DEFAULT}" ]
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;;
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NONE)
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[ "$client" = "$FW" -o "$server" = "$FW" ] && \
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fatal_error " $client $server $policy $loglevel $synparams: NONE policy not allowed to/from the $FW zone"
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|
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[ -n "$clientwild" -o -n "$serverwild" ] && \
|
|
fatal_error " $client $server $policy $loglevel $synparams: NONE policy not allowed with \"all\""
|
|
;;
|
|
*)
|
|
fatal_error "Invalid policy $policy"
|
|
;;
|
|
esac
|
|
|
|
chain=${client}2${server}
|
|
|
|
if is_policy_chain $chain ; then
|
|
if eval test -n \"\$${chain}_is_optional\" ; then
|
|
eval ${chain}_is_optional=
|
|
else
|
|
fatal_error "Duplicate policy: $client $server $policy"
|
|
fi
|
|
fi
|
|
|
|
[ "x$loglevel" = "x-" ] && loglevel=
|
|
[ "x$synparams" = "x-" ] && synparams=
|
|
|
|
policy=${policy%:*}
|
|
|
|
[ $policy = NONE ] || ALL_POLICY_CHAINS="$ALL_POLICY_CHAINS $chain"
|
|
|
|
eval ${chain}_is_policy=Yes
|
|
eval ${chain}_policy=$policy
|
|
eval ${chain}_loglevel=$loglevel
|
|
eval ${chain}_synparams=$synparams
|
|
eval ${chain}_default=$default
|
|
|
|
if [ -n "${clientwild}" ]; then
|
|
if [ -n "${serverwild}" ]; then
|
|
for zone in $ZONES $FW all; do
|
|
for zone1 in $ZONES $FW all; do
|
|
eval pc=\$${zone}2${zone1}_policychain
|
|
|
|
if [ -z "$pc" ]; then
|
|
eval ${zone}2${zone1}_policychain=$chain
|
|
eval ${zone}2${zone1}_policy=$policy
|
|
print_policy $zone $zone1
|
|
fi
|
|
done
|
|
done
|
|
else
|
|
for zone in $ZONES $FW all; do
|
|
eval pc=\$${zone}2${server}_policychain
|
|
|
|
if [ -z "$pc" ]; then
|
|
eval ${zone}2${server}_policychain=$chain
|
|
eval ${zone}2${server}_policy=$policy
|
|
print_policy $zone $server
|
|
fi
|
|
done
|
|
fi
|
|
elif [ -n "$serverwild" ]; then
|
|
for zone in $ZONES $FW all; do
|
|
eval pc=\$${client}2${zone}_policychain
|
|
|
|
if [ -z "$pc" ]; then
|
|
eval ${client}2${zone}_policychain=$chain
|
|
eval ${client}2${zone}_policy=$policy
|
|
print_policy $client $zone
|
|
fi
|
|
done
|
|
else
|
|
eval ${chain}_policychain=${chain}
|
|
print_policy $client $server
|
|
fi
|
|
|
|
done < $TMP_DIR/policy
|
|
}
|
|
|
|
#
|
|
# Find broadcast addresses -- if we are compiling a script and 'detect' is specified for an interface
|
|
# the function returns nothing for that interface
|
|
#
|
|
find_broadcasts() {
|
|
for interface in $ALL_INTERFACES; do
|
|
eval bcast=\$$(chain_base $interface)_broadcast
|
|
if [ "x$bcast" != "xdetect" -a "x${bcast}" != "x-" ]; then
|
|
echo $(separate_list $bcast)
|
|
fi
|
|
done
|
|
}
|
|
|
|
#
|
|
# Find interfaces with BROADCAST=detect
|
|
#
|
|
find_bcastdetect_interfaces() {
|
|
for interface in $ALL_INTERFACES; do
|
|
eval bcast=\$$(chain_base $interface)_broadcast
|
|
[ "x$bcast" = "xdetect" ] && echo $interface
|
|
done
|
|
}
|
|
|
|
#
|
|
# Set /proc/sys/net/ipv4/ip_forward based on $IP_FORWARDING
|
|
#
|
|
setup_forwarding() {
|
|
|
|
progress_message2 "Compiling IP Forwarding..."
|
|
|
|
case "$IP_FORWARDING" in
|
|
On|on)
|
|
save_progress_message "IP Forwarding Enabled"
|
|
save_command "echo 1 > /proc/sys/net/ipv4/ip_forward"
|
|
;;
|
|
Off|off)
|
|
save_progress_message "IP Forwarding Disabled!"
|
|
save_command "echo 0 > /proc/sys/net/ipv4/ip_forward"
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# For each entry in the CRITICALHOSTS global list, add INPUT and OUTPUT rules to
|
|
# enable traffic to/from those hosts.
|
|
#
|
|
enable_critical_hosts()
|
|
{
|
|
for host in $CRITICALHOSTS; do
|
|
interface=${host%:*}
|
|
networks=${host#*:}
|
|
do_iptables -A INPUT -i $interface $(source_ip_range $networks) -j ACCEPT
|
|
do_iptables -A OUTPUT -o $interface $(dest_ip_range $networks) -j ACCEPT
|
|
done
|
|
}
|
|
|
|
#
|
|
# For each entry in the CRITICALHOSTS global list, delete the INPUT and OUTPUT rules that
|
|
# enable traffic to/from those hosts.
|
|
#
|
|
disable_critical_hosts()
|
|
{
|
|
for host in $CRITICALHOSTS; do
|
|
interface=${host%:*}
|
|
networks=${host#*:}
|
|
do_iptables -D INPUT -i $interface $(source_ip_range $networks) -j ACCEPT
|
|
do_iptables -D OUTPUT -o $interface $(dest_ip_range $networks) -j ACCEPT
|
|
done
|
|
}
|
|
|
|
#
|
|
# Logging Rules
|
|
#
|
|
log_rule_limit() # $1 = log level, $2 = chain, $3 = display Chain $4 = disposition , $5 = rate limit $6=log tag $7=command $... = predicates for the rule
|
|
{
|
|
local level=$1
|
|
local chain=$2
|
|
local displayChain=$3
|
|
local disposition=$4
|
|
local rulenum=
|
|
local limit=
|
|
local tag=$6
|
|
local command=${7:--A}
|
|
local prefix
|
|
local base=$(chain_base $displayChain)
|
|
|
|
limit="${5:-$LOGLIMIT}" # Do this here rather than in the declaration above to appease /bin/ash.
|
|
|
|
shift 7
|
|
|
|
save_command "do_log_rule_limit \"$level\" \"$chain\" \"$displayChain\" \"$disposition\" \"$limit\" \"$tag\" \"$command\" $@"
|
|
}
|
|
|
|
log_rule() # $1 = log level, $2 = chain, $3 = disposition , $... = predicates for the rule
|
|
{
|
|
local level=$1
|
|
local chain=$2
|
|
local disposition=$3
|
|
|
|
shift 3
|
|
|
|
log_rule_limit $level $chain $chain $disposition "$LOGLIMIT" "" -A $@
|
|
}
|
|
|
|
#
|
|
# Set up SYN flood protection
|
|
#
|
|
setup_syn_flood_chain ()
|
|
# $1 = policy chain
|
|
# $2 = synparams
|
|
# $3 = loglevel
|
|
{
|
|
local chain=@$1
|
|
local limit=$2
|
|
local limit_burst=
|
|
|
|
case $limit in
|
|
*:*)
|
|
limit_burst="--limit-burst ${limit#*:}"
|
|
limit=${limit%:*}
|
|
;;
|
|
esac
|
|
|
|
run_iptables -N $chain
|
|
run_iptables -A $chain -m limit --limit $limit $limit_burst -j RETURN
|
|
[ -n "$3" ] && \
|
|
log_rule_limit $3 $chain $chain DROP "-m limit --limit 5/min --limit-burst 5" "" ""
|
|
run_iptables -A $chain -j DROP
|
|
}
|
|
|
|
setup_syn_flood_chains()
|
|
{
|
|
for chain in $ALL_POLICY_CHAINS; do
|
|
eval loglevel=\$${chain}_loglevel
|
|
eval synparams=\$${chain}_synparams
|
|
|
|
[ -n "$synparams" ] && setup_syn_flood_chain $chain $synparams $loglevel
|
|
done
|
|
}
|
|
|
|
#
|
|
# Delete existing Proxy ARP
|
|
#
|
|
delete_proxy_arp() {
|
|
indent >&3 << __EOF__
|
|
if [ -s \${VARDIR}/proxyarp ]; then
|
|
while read address interface external haveroute; do
|
|
qt arp -i \$external -d \$address pub
|
|
[ -z "\$haveroute" -a -z "\$NOROUTE" ] && qt ip route del \$address dev \$interface
|
|
done < \${VARDIR}/proxyarp
|
|
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f \$f/proxy_arp ] && echo 0 > \$f/proxy_arp
|
|
done
|
|
fi
|
|
|
|
rm -f \${VARDIR}/proxyarp
|
|
|
|
__EOF__
|
|
|
|
[ -d $STATEDIR ] && touch $STATEDIR/proxyarp
|
|
|
|
}
|
|
|
|
#
|
|
# Delete existing Static NAT
|
|
#
|
|
delete_nat() {
|
|
run_iptables -t nat -F
|
|
run_iptables -t nat -X
|
|
|
|
[ -d $STATEDIR ] && touch $STATEDIR/nat
|
|
|
|
indent >&3 << __EOF__
|
|
|
|
if [ -f \${VARDIR}/nat ]; then
|
|
while read external interface; do
|
|
del_ip_addr \$external \$interface
|
|
done < \${VARDIR}/nat
|
|
|
|
rm -f \${VARDIR}/nat
|
|
fi
|
|
|
|
__EOF__
|
|
}
|
|
|
|
#
|
|
# Setup ECN disabling rules
|
|
#
|
|
setup_ecn() # $1 = file name
|
|
{
|
|
local interfaces=""
|
|
local hosts=
|
|
local h
|
|
|
|
if [ -s ${TMP_DIR}/ecn ]; then
|
|
save_progress_message "Setting up ECN..."
|
|
|
|
progress_message2 "$DOING $1..."
|
|
|
|
while read interface host; do
|
|
list_search $interface $ALL_INTERFACES || \
|
|
fatal_error "Unknown interface $interface"
|
|
list_search $interface $interfaces || \
|
|
interfaces="$interfaces $interface"
|
|
[ "x$host" = "x-" ] && host=
|
|
for h in $(separate_list ${host:-0.0.0.0/0}); do
|
|
hosts="$hosts $interface:$h"
|
|
done
|
|
done < $TMP_DIR/ecn
|
|
|
|
if [ -n "$interfaces" ]; then
|
|
progress_message "$DOING ECN control on${interfaces}..."
|
|
|
|
for interface in $interfaces; do
|
|
chain=$(ecn_chain $interface)
|
|
if havemanglechain $chain; then
|
|
flushmangle $chain
|
|
else
|
|
createmanglechain $chain
|
|
|
|
if [ -n "$MANGLE_FORWARD" ]; then
|
|
run_iptables -t mangle -A PREROUTING -p tcp -o $interface -j $chain
|
|
else
|
|
run_iptables -t mangle -A POSTROUTING -p tcp -o $interface -j $chain
|
|
run_iptables -t mangle -A OUTPUT -p tcp -o $interface -j $chain
|
|
fi
|
|
fi
|
|
done
|
|
|
|
for host in $hosts; do
|
|
interface=${host%:*}
|
|
h=${host#*:}
|
|
run_iptables -t mangle -A $(ecn_chain $interface) -p tcp $(dest_ip_range $h) -j ECN --ecn-tcp-remove
|
|
progress_message_and_save " ECN Disabled to $h through $interface"
|
|
done
|
|
fi
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Set up an exclusion chain
|
|
#
|
|
build_exclusion_chain() # $1 = variable to store chain name into $2 = table, $3 = SOURCE exclusion list, $4 = DESTINATION exclusion list
|
|
{
|
|
local c=excl_${EXCLUSION_SEQ} net
|
|
|
|
EXCLUSION_SEQ=$(( $EXCLUSION_SEQ + 1 ))
|
|
|
|
run_iptables -t $2 -N $c
|
|
|
|
for net in $(separate_list $3); do
|
|
run_iptables -t $2 -A $c $(source_ip_range $net) -j RETURN
|
|
done
|
|
|
|
for net in $(separate_list $4); do
|
|
run_iptables -t $2 -A $c $(dest_ip_range $net) -j RETURN
|
|
done
|
|
|
|
case $2 in
|
|
filter)
|
|
eval exists_${c}=Yes
|
|
;;
|
|
nat)
|
|
eval exists_nat_${c}=Yes
|
|
;;
|
|
esac
|
|
|
|
eval $1=$c
|
|
}
|
|
|
|
#
|
|
# Setup queuing and classes
|
|
#
|
|
setup_tc1() {
|
|
local mark_part= comment=
|
|
#
|
|
# Create the TC mangle chains
|
|
#
|
|
|
|
createmanglechain tcpre
|
|
|
|
if [ -n "$MANGLE_FORWARD" ]; then
|
|
createmanglechain tcfor
|
|
createmanglechain tcpost
|
|
fi
|
|
|
|
createmanglechain tcout
|
|
#
|
|
# Process the TC Rules File
|
|
#
|
|
if [ -s $TMP_DIR/tcrules ]; then
|
|
save_progress_message "Setting up TC Rules..."
|
|
save_command setup_tc_rules
|
|
save_command
|
|
|
|
fi
|
|
#
|
|
# Just in case the file ended with a comment
|
|
#
|
|
if [ -n "$COMMENTS" ]; then
|
|
save_command
|
|
save_command COMMENT=
|
|
save_command
|
|
fi
|
|
#
|
|
# Link to the TC mangle chains from the main chains
|
|
#
|
|
|
|
#
|
|
# Route marks are restored in PREROUTING/OUTPUT prior to these rules. We only send
|
|
# packets that are not part of a marked connection to the 'tcpre/tcout' chains.
|
|
#
|
|
if [ -n "$ROUTEMARK_INTERFACES" -a -z "$TC_EXPERT" ]; then
|
|
mark_part="-m mark --mark 0/0xFF00"
|
|
#
|
|
# But let marks in tcpre override those assigned by 'track'
|
|
#
|
|
for interface in $ROUTEMARK_INTERFACES; do
|
|
run_iptables -t mangle -A PREROUTING -i $interface -j tcpre
|
|
done
|
|
fi
|
|
|
|
run_iptables -t mangle -A PREROUTING $mark_part -j tcpre
|
|
run_iptables -t mangle -A OUTPUT $mark_part -j tcout
|
|
|
|
if [ -n "$MANGLE_FORWARD" ]; then
|
|
run_iptables -t mangle -A FORWARD -j tcfor
|
|
run_iptables -t mangle -A POSTROUTING -j tcpost
|
|
fi
|
|
|
|
if [ -n "$HIGH_ROUTE_MARKS" ]; then
|
|
for chain in INPUT FORWARD POSTROUTING; do
|
|
run_iptables -t mangle -I $chain -j MARK --and-mark 0xFF
|
|
done
|
|
fi
|
|
|
|
if [ -n "$TC_SCRIPT" ]; then
|
|
save_progress_message "Setting up Traffic Control..."
|
|
append_file $TC_SCRIPT
|
|
elif [ "$TC_ENABLED" = Internal ]; then
|
|
if [ -n "$LIB_tc_LOADED" ]; then
|
|
save_command
|
|
save_command setup_traffic_shaping
|
|
save_command
|
|
fi
|
|
fi
|
|
}
|
|
|
|
setup_tc() {
|
|
|
|
progress_message2 "$DOING Traffic Control Rules..."
|
|
|
|
setup_tc1
|
|
}
|
|
|
|
#
|
|
# Clear Traffic Shaping
|
|
#
|
|
delete_tc()
|
|
{
|
|
save_progress_message "Clearing Traffic Control/QOS"
|
|
|
|
append_file tcclear
|
|
|
|
indent >&3 << __EOF__
|
|
ip link list | while read inx interface details; do
|
|
case \$inx in
|
|
[0-9]*)
|
|
qt tc qdisc del dev \${interface%:} root
|
|
qt tc qdisc del dev \${interface%:} ingress
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
done
|
|
__EOF__
|
|
}
|
|
|
|
#
|
|
# Refresh queuing and classes
|
|
#
|
|
refresh_tc() {
|
|
|
|
local comment=
|
|
|
|
if [ -n "$CLEAR_TC" ]; then
|
|
delete_tc
|
|
save_command
|
|
fi
|
|
|
|
[ -n "$MARK_IN_FORWARD_CHAIN" ] && chain=tcfor || chain=tcpre
|
|
|
|
#
|
|
# Flush the TC mangle chains
|
|
#
|
|
|
|
if [ -n "$MANGLE_FORWARD" ]; then
|
|
run_iptables -t mangle -F tcfor
|
|
run_iptables -t mangle -F tcpost
|
|
fi
|
|
|
|
run_iptables -t mangle -F tcpre
|
|
run_iptables -t mangle -F tcout
|
|
#
|
|
# Remove all exclusion chains from the mangle table
|
|
#
|
|
indent >&3 << __EOF__
|
|
|
|
\$IPTABLES -t mangle -L -n | grep '^Chain excl_' | while read junk chain rest; do
|
|
run_iptables -t mangle -F \$chain
|
|
run_iptables -t mangle -X \$chain
|
|
done
|
|
|
|
__EOF__
|
|
#
|
|
# Process the TC Rules File
|
|
#
|
|
if [ -s $TMP_DIR/tcrules ]; then
|
|
save_progress_message "Refreshing Traffic Control Rules..."
|
|
|
|
save_command setup_tc_rules
|
|
save_command
|
|
fi
|
|
#
|
|
# Just in case the file ended with a comment
|
|
#
|
|
if [ -n "$COMMENTS" ]; then
|
|
save_command
|
|
save_command COMMENT=
|
|
save_command
|
|
fi
|
|
|
|
if [ -n "$TC_SCRIPT" ]; then
|
|
save_progress_message "Refreshing Traffic Shaping"
|
|
run_user_exit $TC_SCRIPT
|
|
elif [ "$TC_ENABLED" = Internal -a -n "$LIB_tc_LOADED" ]; then
|
|
save_command
|
|
save_command setup_traffic_shaping
|
|
save_command
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Compile refresh of the firewall
|
|
#
|
|
compile_refresh_firewall()
|
|
{
|
|
local INDENT=""
|
|
local DOING="Compiling Refresh of"
|
|
local DONE="Compiled"
|
|
local indent
|
|
|
|
save_command "refresh_firewall()"
|
|
save_command "{"
|
|
INDENT=" "
|
|
|
|
append_file refresh
|
|
|
|
#
|
|
# Blacklist
|
|
#
|
|
save_command "if chain_exists blacklst; then"
|
|
indent="$INDENT"
|
|
INDENT="$INDENT "
|
|
|
|
save_command progress_message2 \"Refreshing Black List...\"
|
|
run_iptables -F blacklst
|
|
|
|
[ -s ${TMP_DIR}/blacklist ] && save_command load_blacklist
|
|
|
|
INDENT="$indent"
|
|
save_command "fi"
|
|
|
|
ecn=$(find_file ecn)
|
|
|
|
if [ -f $ecn ] && [ -n "$MANGLE_ENABLED" ]; then
|
|
setup_ecn $ecn
|
|
fi
|
|
#
|
|
# Refresh Traffic Control
|
|
#
|
|
[ -n "$MANGLE_ENABLED" ] && refresh_tc
|
|
|
|
append_file refreshed
|
|
|
|
save_command "cp -f \$(my_pathname) \${VARDIR}/.restore"
|
|
|
|
INDENT=""
|
|
|
|
save_command "}"
|
|
save_command
|
|
|
|
}
|
|
|
|
#
|
|
# Source the extension script for an action, if any
|
|
#
|
|
process_action_file() # $1 = File Name
|
|
{
|
|
if ! list_search $1 $BUILTIN_ACTIONS; then
|
|
local user_exit=$(find_file $1)
|
|
|
|
if [ -f $user_exit ]; then
|
|
progress_message "Processing $user_exit ..."
|
|
|
|
. $user_exit
|
|
fi
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Create and record a log action chain -- Log action chains have names
|
|
# that are formed from the action name by prepending a "%" and appending
|
|
# a 1- or 2-digit sequence number. In the functions that follow,
|
|
# the CHAIN, LEVEL and TAG variable serves as arguments to the user's
|
|
# exit. We call the exit corresponding to the name of the action but we
|
|
# set CHAIN to the name of the iptables chain where rules are to be added.
|
|
# Similarly, LEVEL and TAG contain the log level and log tag respectively.
|
|
#
|
|
# For each <action>, we maintain two variables:
|
|
#
|
|
# <action>_actchain - The action chain number.
|
|
# <action>_chains - List of ( level[:tag] , chainname ) pairs
|
|
#
|
|
# The maximum length of a chain name is 30 characters -- since the log
|
|
# action chain name is 2-3 characters longer than the base chain name,
|
|
# this function truncates the original chain name where necessary before
|
|
# it adds the leading "%" and trailing sequence number.
|
|
|
|
createlogactionchain() # $1 = Action Name, $2 = Log Level [: Log Tag ]
|
|
{
|
|
local actchain= action=$1 level=$2
|
|
|
|
eval actchain=\${${action}_actchain}
|
|
|
|
case ${#action} in
|
|
29|30)
|
|
CHAIN=$(echo $action | truncate 28) # %...n makes 30
|
|
;;
|
|
*)
|
|
CHAIN=${action}
|
|
;;
|
|
esac
|
|
|
|
while havechain %${CHAIN}${actchain}; do
|
|
actchain=$(($actchain + 1))
|
|
[ $actchain -eq 10 -a ${#CHAIN} -eq 28 ] && CHAIN=$(echo $CHAIN | truncate 27) # %...nn makes 30
|
|
done
|
|
|
|
CHAIN=%${CHAIN}${actchain}
|
|
|
|
eval ${action}_actchain=$(($actchain + 1))
|
|
|
|
createchain $CHAIN No
|
|
LEVEL=${level%:*}
|
|
if [ "$LEVEL" != "$level" ]; then
|
|
TAG=${level#*:}
|
|
else
|
|
TAG=
|
|
fi
|
|
|
|
[ none = "${LEVEL%\!}" ] && LEVEL=
|
|
|
|
process_action_file $1
|
|
|
|
eval ${action}_chains=\"\$${action}_chains $level $CHAIN\"
|
|
|
|
}
|
|
|
|
#
|
|
# Create an action chain and run it's associated user exit
|
|
#
|
|
|
|
createactionchain() # $1 = Action, including log level and tag if any
|
|
{
|
|
create_simple_chain()
|
|
{
|
|
CHAIN=$1
|
|
LEVEL=
|
|
TAG=
|
|
createchain $CHAIN no
|
|
|
|
process_action_file $CHAIN
|
|
}
|
|
|
|
case $1 in
|
|
*::*)
|
|
fatal_error "Invalid ACTION $1"
|
|
;;
|
|
*:*:*)
|
|
set -- $(split $1)
|
|
createlogactionchain $1 $2:$3
|
|
;;
|
|
*:*)
|
|
set -- $(split $1)
|
|
|
|
if [ "x$2" = xnone ]; then
|
|
create_simple_chain $1
|
|
else
|
|
createlogactionchain $1 $2
|
|
fi
|
|
;;
|
|
*)
|
|
create_simple_chain $1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Find the chain that handles the passed action. If the chain cannot be found,
|
|
# a fatal error is generated and the function does not return.
|
|
#
|
|
find_logactionchain() # $1 = Action, including log level and tag if any
|
|
{
|
|
local fullaction=$1 action=${1%%:*} level= chains=
|
|
|
|
find_simpleaction() {
|
|
havechain $action || fatal_error "Fatal error in find_logactionchain"
|
|
echo $action
|
|
}
|
|
|
|
case $fullaction in
|
|
*:*)
|
|
level=${fullaction#*:}
|
|
if [ "x$level" = xnone ]; then
|
|
find_simpleaction
|
|
return
|
|
fi
|
|
;;
|
|
*)
|
|
find_simpleaction
|
|
return
|
|
;;
|
|
esac
|
|
|
|
eval chains="\$${action}_chains"
|
|
|
|
set -- $chains
|
|
|
|
while [ $# -gt 0 ]; do
|
|
[ "$1" = "$level" ] && { echo $2 ; return ; }
|
|
shift 2
|
|
done
|
|
|
|
fatal_error "Fatal error in find_logactionchain"
|
|
|
|
}
|
|
|
|
#
|
|
# This function determines the logging for a subordinate action or a rule within a subordinate action
|
|
#
|
|
merge_levels() # $1=level at which superior action is called, $2=level at which the subordinate rule is called
|
|
{
|
|
local superior=$1 subordinate=$2
|
|
|
|
set -- $(split $1)
|
|
|
|
case $superior in
|
|
*:*:*)
|
|
case $2 in
|
|
'none!')
|
|
echo ${subordinate%%:*}:'none!':$3
|
|
return
|
|
;;
|
|
*'!')
|
|
echo ${subordinate%%:*}:$2:$3
|
|
return
|
|
;;
|
|
*)
|
|
case $subordinate in
|
|
*:*:*)
|
|
echo $subordinate
|
|
return
|
|
;;
|
|
*:*)
|
|
echo $subordinate:$3
|
|
return
|
|
;;
|
|
*)
|
|
echo ${subordinate%%:*}:$2:$3
|
|
return
|
|
;;
|
|
esac
|
|
;;
|
|
esac
|
|
;;
|
|
*:*)
|
|
case $2 in
|
|
'none!')
|
|
echo ${subordinate%%:*}:'none!'
|
|
return
|
|
;;
|
|
*'!')
|
|
echo ${subordinate%%:*}:$2
|
|
return
|
|
;;
|
|
*)
|
|
case $subordinate in
|
|
*:*)
|
|
echo $subordinate
|
|
return
|
|
;;
|
|
*)
|
|
echo ${subordinate%%:*}:$2
|
|
return
|
|
;;
|
|
esac
|
|
;;
|
|
esac
|
|
;;
|
|
*)
|
|
echo $subordinate
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Define the builtin actions. They are available even when USE_ACTIONS=No
|
|
#
|
|
define_builtin_actions() {
|
|
ACTIONS="dropBcast allowBcast dropNotSyn rejNotSyn dropInvalid allowInvalid allowinUPnP allowoutUPnP forwardUPnP Limit"
|
|
BUILTIN_ACTIONS="$ACTIONS"
|
|
USEDACTIONS=
|
|
}
|
|
|
|
#
|
|
# This function maps old action names into their new macro equivalents
|
|
#
|
|
map_old_action() # $1 = Potential Old Action
|
|
{
|
|
local macro= aktion
|
|
|
|
if [ -n "$MAPOLDACTIONS" ]; then
|
|
case $1 in
|
|
*/*)
|
|
echo $1
|
|
return
|
|
;;
|
|
*)
|
|
if [ -f $(find_file macro.$1) ]; then
|
|
echo $1
|
|
return
|
|
fi
|
|
|
|
case $1 in
|
|
Allow*)
|
|
macro=${1#*w}
|
|
aktion=ACCEPT
|
|
;;
|
|
Drop*)
|
|
macro=${1#*p}
|
|
aktion=DROP
|
|
;;
|
|
Reject*)
|
|
macro=${1#*t}
|
|
aktion=REJECT
|
|
;;
|
|
*)
|
|
echo $1
|
|
return
|
|
;;
|
|
esac
|
|
esac
|
|
|
|
if [ -f $(find_file macro.$macro) ]; then
|
|
echo $macro/$aktion
|
|
return
|
|
fi
|
|
fi
|
|
|
|
echo $1
|
|
}
|
|
|
|
# This function substitutes the second argument for the first part of the first argument up to the first colon (":")
|
|
#
|
|
# Example:
|
|
#
|
|
# substitute_action DNAT PARAM:info:FTP
|
|
#
|
|
# produces "DNAT:info:FTP"
|
|
#
|
|
substitute_action() # $1 = parameter, $2 = action
|
|
{
|
|
local logpart=${2#*:}
|
|
|
|
case $2 in
|
|
*:*)
|
|
echo $1:${logpart%/}
|
|
;;
|
|
*)
|
|
echo $1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Third phase of action processing. It needs to be here in the compiler because
|
|
# it handles builtin actions.
|
|
#
|
|
process_actions3()
|
|
{
|
|
for xaction in $USEDACTIONS; do
|
|
#
|
|
# Find the chain associated with this action:level:tag
|
|
#
|
|
xchain=$(find_logactionchain $xaction)
|
|
#
|
|
# Split the action:level:tag
|
|
#
|
|
set -- $(split $xaction)
|
|
|
|
xaction1=$1
|
|
xlevel=$2
|
|
xtag=$3
|
|
|
|
case $xlevel in
|
|
none|none'!')
|
|
ylevel=
|
|
;;
|
|
*)
|
|
ylevel=$xlevel;
|
|
;;
|
|
esac
|
|
|
|
save_progress_message "Creating action chain $xaction1"
|
|
|
|
#
|
|
# Handle Builtin actions
|
|
#
|
|
case $xaction1 in
|
|
dropBcast)
|
|
if [ -n "$USEPKTTYPE" ]; then
|
|
if [ -n "$ylevel" ]; then
|
|
log_rule_limit ${ylevel%\!} $xchain dropBcast DROP "" "$xtag" -A -m pkttype --pkt-type broadcast
|
|
log_rule_limit ${ylevel%\!} $xchain dropBcast DROP "" "$xtag" -A -m pkttype --pkt-type multicast
|
|
fi
|
|
|
|
run_iptables -A dropBcast -m pkttype --pkt-type broadcast -j DROP
|
|
run_iptables -A dropBcast -m pkttype --pkt-type multicast -j DROP
|
|
else
|
|
for interface in $(find_bcastdetect_interfaces); do
|
|
indent >&3 << __EOF__
|
|
|
|
ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u | while read address; do
|
|
__EOF__
|
|
[ -n "$ylevel" ] && indent >&3 << __EOF__
|
|
log_rule_limit ${ylevel%\!} $xchain dropBcast DROP "" "$xtag" -A -d \$address
|
|
__EOF__
|
|
indent >&3 << __EOF__
|
|
run_iptables -A $xchain -d \$address -j DROP
|
|
done
|
|
|
|
__EOF__
|
|
done
|
|
|
|
for address in $(find_broadcasts) 255.255.255.255 224.0.0.0/4 ; do
|
|
[ -n "$ylevel" ] && log_rule_limit ${ylevel%\!} $xchain dropBcast DROP "" "$xtag" -A -d $address
|
|
|
|
run_iptables -A $xchain -d $address -j DROP
|
|
done
|
|
fi
|
|
;;
|
|
allowBcast)
|
|
if [ -n "$USEPKTTYPE" ]; then
|
|
if [ -n "$ylevel" ]; then
|
|
log_rule_limit ${ylevel%\!} $xchain allowBcast ACCEPT "" "$xtag" -A -m pkttype --pkt-type broadcast
|
|
log_rule_limit ${ylevel%\!} $xchain allowBcast ACCEPT "" "$xtag" -A -m pkttype --pkt-type multicast
|
|
fi
|
|
|
|
run_iptables -A allowBcast -m pkttype --pkt-type broadcast -j ACCEPT
|
|
run_iptables -A allowBcast -m pkttype --pkt-type multicast -j ACCEPT
|
|
else
|
|
for interface in $(find_bcastdetect_interfaces); do
|
|
indent >&3 << __EOF__
|
|
|
|
ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u | while read address; do
|
|
__EOF__
|
|
[ -n "$ylevel" ] && indent >&3 << __EOF__
|
|
log_rule_limit ${ylevel%\!} $xchain allowBcast ACCEPT "" "$xtag" -A -d \$address
|
|
__EOF__
|
|
|
|
indent >&3 << __EOF__
|
|
run_iptables -A $xchain -d \$address -j ACCEPT
|
|
done
|
|
|
|
__EOF__
|
|
done
|
|
|
|
for address in $(find_broadcasts) 255.255.255.255 224.0.0.0/4 ; do
|
|
[ -n "$ylevel" ] && log_rule_limit ${ylevel%\!} $xchain allowBcast ACCEPT "" "$xtag" -A -d $address
|
|
|
|
run_iptables -A $xchain -d $address -j ACCEPT
|
|
done
|
|
fi
|
|
;;
|
|
dropNotSyn)
|
|
[ -n "$ylevel" ] && \
|
|
log_rule_limit ${ylevel%\!} $xchain dropNotSyn DROP "" "$xtag" -A -p tcp ! --syn
|
|
run_iptables -A $xchain -p tcp ! --syn -j DROP
|
|
;;
|
|
rejNotSyn)
|
|
[ -n "$ylevel" ] && \
|
|
log_rule_limit ${ylevel%\!} $xchain rejNotSyn REJECT "" "$xtag" -A -p tcp ! --syn
|
|
run_iptables -A $xchain -p tcp ! --syn -j REJECT --reject-with tcp-reset
|
|
;;
|
|
dropInvalid)
|
|
[ -n "$ylevel" ] && \
|
|
log_rule_limit ${ylevel%\!} $xchain dropInvalid DROP "" "$xtag" -A -m state --state INVALID
|
|
run_iptables -A $xchain -m state --state INVALID -j DROP
|
|
;;
|
|
allowInvalid)
|
|
[ -n "$ylevel" ] && \
|
|
log_rule_limit ${ylevel%\!} $xchain allowInvalid ACCEPT "" "$xtag" -A -m state --state INVALID
|
|
run_iptables -A $xchain -m state --state INVALID -j ACCEPT
|
|
;;
|
|
forwardUPnP)
|
|
;;
|
|
allowinUPnP)
|
|
if [ -n "$ylevel" ]; then
|
|
log_rule_limit ${ylevel%\!} $xchain allowinUPnP ACCEPT "" "$xtag" -A -p udp --dport 1900
|
|
log_rule_limit ${ylevel%\!} $xchain allowinUPnP ACCEPT "" "$xtag" -A -p tcp --dport 49152
|
|
fi
|
|
|
|
run_iptables -A $xchain -p udp --dport 1900 -j ACCEPT
|
|
run_iptables -A $xchain -p tcp --dport 49152 -j ACCEPT
|
|
;;
|
|
allowoutUPnP)
|
|
[ -n "$ylevel" ] && \
|
|
log_rule_limit ${ylevel%\!} $xchain allowoutUPnP ACCEPT "" "$xtag" -A -m owner --owner-cmd upnpd
|
|
run_iptables -A $xchain -m owner --cmd-owner upnpd -j ACCEPT
|
|
;;
|
|
Limit)
|
|
set -- $(separate_list $xtag)
|
|
|
|
[ $# -eq 3 ] || fatal_error "Limit rules must include <set name>,<max connections>,<interval> as the log tag"
|
|
|
|
run_iptables -A $xchain -m recent --name $1 --set
|
|
|
|
if [ -n "$ylevel" ]; then
|
|
run_iptables -N $xchain%
|
|
log_rule_limit $ylevel $xchain% $1 DROP "" "" -A
|
|
run_iptables -A $xchain% -j DROP
|
|
run_iptables -A $xchain -m recent --name $1 --update --seconds $3 --hitcount $(( $2 + 1 )) -j $xchain%
|
|
else
|
|
run_iptables -A $xchain -m recent --update --name $1 --seconds $3 --hitcount $(( $2 + 1 )) -j DROP
|
|
fi
|
|
|
|
run_iptables -A $xchain -j ACCEPT
|
|
;;
|
|
*)
|
|
#
|
|
# Not a builtin
|
|
#
|
|
process_action3
|
|
;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
#
|
|
# Add one Filter Rule
|
|
#
|
|
# The caller has established the following variables:
|
|
# client = SOURCE IP or MAC
|
|
# server = DESTINATION IP or interface
|
|
# protocol = Protocol
|
|
# address = Original Destination Address
|
|
# port = Destination Port
|
|
# cport = Source Port
|
|
# multioption = String to invoke multiport match if appropriate
|
|
# servport = Port the server listens on
|
|
# chain = The canonical chain for this rule
|
|
# logchain = The chain that should be mentioned in log messages
|
|
# ratelimit = Optional rate limiting clause
|
|
# userandgroup = -m owner clause
|
|
# userspec = User name
|
|
# logtag = Log tag
|
|
# policy = Applicable Policy
|
|
#
|
|
add_a_rule() {
|
|
local natrule=
|
|
|
|
do_ports() {
|
|
if [ -n "$port" ]; then
|
|
dports="--dport"
|
|
if [ -n "$multioption" -a "$port" != "${port%,*}" ]; then
|
|
multiport="$multioption"
|
|
dports="--dports"
|
|
fi
|
|
dports="$dports $port"
|
|
fi
|
|
|
|
if [ -n "$cport" ]; then
|
|
sports="--sport"
|
|
if [ -n "$multioption" -a "$cport" != "${cport%,*}" ]; then
|
|
multiport="$multioption"
|
|
sports="--sports"
|
|
fi
|
|
sports="$sports $cport"
|
|
fi
|
|
}
|
|
|
|
interface_error()
|
|
{
|
|
fatal_error "Unknown interface $1 in rule: \"$rule\""
|
|
}
|
|
|
|
rule_interface_verify()
|
|
{
|
|
verify_interface $1 || interface_error $1
|
|
}
|
|
|
|
handle_exclusion()
|
|
{
|
|
build_exclusion_chain chain filter "$excludesource" "$excludedest"
|
|
|
|
if [ -n "$addr" -a -n "$CONNTRACK_MATCH" ]; then
|
|
for adr in $(separate_list $addr); do
|
|
run_iptables -A $logchain $state $(fix_bang $proto $sports $multiport $dports) $user -m conntrack --ctorigdst $adr -j $chain
|
|
done
|
|
addr=
|
|
else
|
|
run_iptables -A $logchain $state $(fix_bang $cli $proto $sports $multiport $dports) $user -j $chain
|
|
fi
|
|
|
|
cli=
|
|
proto=
|
|
sports=
|
|
multiport=
|
|
dports=
|
|
user=
|
|
state=
|
|
}
|
|
|
|
do_ipp2p() {
|
|
[ -n "$IPP2P_MATCH" ] || fatal_error "Your kernel and/or iptables does not have IPP2P match support. Rule: \"$rule\""
|
|
|
|
dports="-m ipp2p --${port:-ipp2p}"
|
|
|
|
case $proto in
|
|
ipp2p|IPP2P|ipp2p:tcp|IPP2P:TCP)
|
|
port=
|
|
proto=tcp
|
|
do_ports
|
|
;;
|
|
ipp2p:udp|IPP2P:UDP)
|
|
port=
|
|
proto=udp
|
|
do_ports
|
|
;;
|
|
ipp2p:all|IPP2P:ALL)
|
|
port=
|
|
proto=all
|
|
;;
|
|
*)
|
|
fatal_error "Invalid IPP2P protocol ${proto#*:}. Rule: \"$rule\""
|
|
;;
|
|
esac
|
|
}
|
|
|
|
# Set source variables. The 'cli' variable will hold the client match predicate(s).
|
|
|
|
cli=
|
|
|
|
case "$client" in
|
|
-)
|
|
;;
|
|
*:*)
|
|
rule_interface_verify ${client%:*}
|
|
cli="$(match_source_dev ${client%:*}) $(source_ip_range ${client#*:})"
|
|
;;
|
|
*.*.*|+*)
|
|
cli="$(source_ip_range $client)"
|
|
;;
|
|
~*|!~*)
|
|
cli=$(mac_match $client)
|
|
;;
|
|
*)
|
|
if [ -n "$client" ]; then
|
|
rule_interface_verify $client
|
|
cli="$(match_source_dev $client)"
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
# Set destination variables - 'serv' and 'dest_interface' hold the server match predicate(s).
|
|
|
|
dest_interface=
|
|
serv=
|
|
|
|
case "$server" in
|
|
-)
|
|
;;
|
|
*.*.*|+*)
|
|
serv=$server
|
|
;;
|
|
~*|!~*)
|
|
fatal_error "Rule \"$rule\" - Destination may not be specified by MAC Address"
|
|
;;
|
|
*)
|
|
if [ -n "$server" ]; then
|
|
[ -n "$nonat" ] && fatal_error "Destination interface not allowed with $logtarget"
|
|
rule_interface_verify $server
|
|
dest_interface="$(match_dest_dev $server)"
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
# Setup protocol and port variables
|
|
|
|
sports=
|
|
dports=
|
|
proto=$protocol
|
|
addr=$address
|
|
servport=$serverport
|
|
multiport=
|
|
user="$userandgroup"
|
|
|
|
# Restore $chain to the canonical chain.
|
|
|
|
chain=$logchain
|
|
|
|
[ x$port = x- ] && port=
|
|
[ x$cport = x- ] && cport=
|
|
|
|
case $proto in
|
|
tcp|TCP|6)
|
|
do_ports
|
|
;;
|
|
tcp:syn)
|
|
proto="tcp --syn"
|
|
do_ports
|
|
;;
|
|
udp|UDP|17)
|
|
do_ports
|
|
;;
|
|
icmp|ICMP|1)
|
|
[ -n "$port" ] && dports="--icmp-type $port"
|
|
;;
|
|
all|ALL)
|
|
[ -n "$port" ] && \
|
|
fatal_error "Port number not allowed with protocol \"all\"; rule: \"$rule\""
|
|
proto=
|
|
;;
|
|
ipp2p|IPP2P|ipp2p:*|IPP2P:*)
|
|
do_ipp2p
|
|
;;
|
|
*)
|
|
[ -n "$port" ] && \
|
|
fatal_error "Port number not allowed with protocol \"$proto\"; rule: \"$rule\""
|
|
;;
|
|
esac
|
|
|
|
proto="${proto:+-p $proto}"
|
|
|
|
# Some misc. setup
|
|
|
|
case "$logtarget" in
|
|
ACCEPT|DROP|REJECT|CONTINUE)
|
|
if [ "$SECTION" != DONE ]; then
|
|
#
|
|
# This function is called from process_default_macro() after rules are DONE
|
|
#
|
|
if [ -z "$proto" -a -z "$cli" -a -z "$serv" -a -z "$servport" -a -z "$user" -a -z "$excludesource" -a -z "$excludedest" ] ; then
|
|
error_message "WARNING -- Rule \"$rule\" is a POLICY"
|
|
error_message " -- and should be moved to the policy file"
|
|
fi
|
|
fi
|
|
;;
|
|
REDIRECT)
|
|
[ -n "$excludedest" ] && fatal_error "Invalid DEST for this ACTION; rule \"$rule\""
|
|
|
|
[ -n "$serv" ] && \
|
|
fatal_error "REDIRECT rules cannot specify a server IP; rule: \"$rule\""
|
|
servport=${servport:=$port}
|
|
natrule=Yes
|
|
;;
|
|
DNAT|SAME)
|
|
[ -n "$excludedest" ] && fatal_error "Invalid DEST for this ACTION; rule \"$rule\""
|
|
|
|
[ -n "$serv" ] || \
|
|
fatal_error "$logtarget rules require a server address; rule: \"$rule\""
|
|
natrule=Yes
|
|
;;
|
|
LOG)
|
|
[ -z "$loglevel" ] && \
|
|
fatal_error "LOG requires log level"
|
|
;;
|
|
esac
|
|
|
|
case $SECTION in
|
|
ESTABLISHED|RELATED)
|
|
[ -n "$FASTACCEPT" ] && fatal_error "Entries in the $SECTION SECTION of the rules file not permitted with FASTACCEPT=Yes"
|
|
state="-m state --state $SECTION"
|
|
;;
|
|
*)
|
|
state=
|
|
;;
|
|
esac
|
|
|
|
if [ -n "${serv}${servport}" ]; then
|
|
|
|
# A specific server or server port given
|
|
|
|
if [ -n "$natrule" ]; then
|
|
lib_load nat "$logtarget Rules"
|
|
add_nat_rule
|
|
elif [ -n "$servport" -a "$servport" != "$port" ]; then
|
|
fatal_error "Only DNAT, SAME and REDIRECT rules may specify destination port mapping; rule \"$rule\""
|
|
fi
|
|
|
|
if [ -n "${excludesource}${excludedest}" ]; then
|
|
handle_exclusion
|
|
fi
|
|
|
|
if [ -z "$dnat_only" ]; then
|
|
if [ -n "$serv" ]; then
|
|
for serv1 in $(separate_list $serv); do
|
|
for srv in $(firewall_ip_range $serv1); do
|
|
if [ -n "$addr" -a -n "$CONNTRACK_MATCH" ]; then
|
|
if [ "$addr" = detect ]; then
|
|
indent >&3 << __EOF__
|
|
run_iptables -A $chain $state $proto $ratelimit $multiport $cli $sports $(dest_ip_range $srv) $dports -m conntrack --ctorigdst \$adr $user -j $target
|
|
done
|
|
|
|
__EOF__
|
|
else
|
|
for adr in $(separate_list $addr); do
|
|
if [ -n "$loglevel" -a -z "$natrule" ]; then
|
|
log_rule_limit $loglevel $chain $logchain $logtarget "$ratelimit" "$logtag" -A -m conntrack --ctorigdst $adr \
|
|
$user $(fix_bang $proto $sports $multiport $cli $(dest_ip_range $srv) $dports) $state
|
|
fi
|
|
|
|
run_iptables2 -A $chain $state $proto $ratelimit $multiport $cli $sports \
|
|
$(dest_ip_range $srv) $dports -m conntrack --ctorigdst $adr $user -j $target
|
|
done
|
|
fi
|
|
else
|
|
if [ -n "$loglevel" -a -z "$natrule" ]; then
|
|
log_rule_limit $loglevel $chain $logchain $logtarget "$ratelimit" "$logtag" -A $user \
|
|
$state $(fix_bang $proto $sports $multiport $cli $(dest_ip_range $srv) $dports)
|
|
fi
|
|
|
|
if [ -n "$nonat" ]; then
|
|
addnatrule $(dnat_chain $source) $proto $multiport \
|
|
$cli $sports $(dest_ip_range $srv) $dports $ratelimit $user -j RETURN
|
|
fi
|
|
|
|
if [ "$logtarget" != NONAT ]; then
|
|
run_iptables2 -A $chain $state $proto $multiport $cli $sports \
|
|
$(dest_ip_range $srv) $dports $ratelimit $user -j $target
|
|
fi
|
|
fi
|
|
done
|
|
done
|
|
else
|
|
if [ -n "$loglevel" -a -z "$natrule" ]; then
|
|
log_rule_limit $loglevel $chain $logchain $logtarget "$ratelimit" "$logtag" -A $user \
|
|
$state $(fix_bang $proto $sports $multiport $cli $dports)
|
|
fi
|
|
|
|
[ -n "$nonat" ] && \
|
|
addnatrule $(dnat_chain $source) $proto $multiport \
|
|
$cli $sports $dports $ratelimit $user -j RETURN
|
|
|
|
[ "$logtarget" != NONAT ] && \
|
|
run_iptables2 -A $chain $state $proto $multiport $cli $sports \
|
|
$dports $ratelimit $user -j $target
|
|
fi
|
|
fi
|
|
else
|
|
|
|
# Destination is a simple zone
|
|
|
|
if [ -n "${excludesource}${excludedest}" ]; then
|
|
handle_exclusion
|
|
fi
|
|
|
|
if [ -n "$addr" ]; then
|
|
for adr in $(separate_list $addr); do
|
|
if [ -n "$loglevel" ]; then
|
|
log_rule_limit $loglevel $chain $logchain $logtarget "$ratelimit" "$logtag" -A $user \
|
|
$state $(fix_bang $proto $multiport $cli $dest_interface $sports $dports -m conntrack --ctorigdst $adr)
|
|
fi
|
|
|
|
if [ "$logtarget" != LOG ]; then
|
|
if [ -n "$nonat" ]; then
|
|
addnatrule $(dnat_chain $source) $proto $multiport \
|
|
$cli $sports $dports $ratelimit $user -m conntrack --ctorigdst $adr -j RETURN
|
|
fi
|
|
|
|
if [ "$logtarget" != NONAT ]; then
|
|
run_iptables2 -A $chain $state $proto $multiport $cli $dest_interface \
|
|
$sports $dports $ratelimit $user -m conntrack --ctorigdst $adr -j $target
|
|
fi
|
|
fi
|
|
done
|
|
else
|
|
if [ -n "$loglevel" ]; then
|
|
log_rule_limit $loglevel $chain $logchain $logtarget "$ratelimit" "$logtag" -A $user \
|
|
$state $(fix_bang $proto $multiport $cli $dest_interface $sports $dports)
|
|
fi
|
|
|
|
if [ "$logtarget" != LOG ]; then
|
|
if [ -n "$nonat" ]; then
|
|
addnatrule $(dnat_chain $source) $proto $multiport \
|
|
$cli $sports $dports $ratelimit $user -j RETURN
|
|
fi
|
|
|
|
if [ "$logtarget" != NONAT ]; then
|
|
run_iptables2 -A $chain $state $proto $multiport $cli $dest_interface \
|
|
$sports $dports $ratelimit $user -j $target
|
|
fi
|
|
fi
|
|
fi
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Process the contents of the USER/GROUP column
|
|
#
|
|
process_userspec()
|
|
{
|
|
[ "x$userspec" = x- ] && userspec=
|
|
|
|
if [ -n "$userspec" ]; then
|
|
|
|
userandgroup="-m owner"
|
|
|
|
case "$userspec" in
|
|
!*+*)
|
|
if [ -n "${userspec#*+}" ]; then
|
|
userandgroup="$userandgroup ! --cmd-owner ${userspec#*+}"
|
|
fi
|
|
userspec=${userspec%+*}
|
|
;;
|
|
*+*)
|
|
if [ -n "${userspec#*+}" ]; then
|
|
userandgroup="$userandgroup --cmd-owner ${userspec#*+}"
|
|
fi
|
|
userspec=${userspec%+*}
|
|
;;
|
|
esac
|
|
|
|
case "$userspec" in
|
|
!*:*)
|
|
if [ "$userspec" != "!:" ]; then
|
|
temp="${userspec#!}"
|
|
temp="${temp%:*}"
|
|
[ -n "$temp" ] && userandgroup="$userandgroup ! --uid-owner $temp"
|
|
temp="${userspec#*:}"
|
|
[ -n "$temp" ] && userandgroup="$userandgroup ! --gid-owner $temp"
|
|
fi
|
|
;;
|
|
*:*)
|
|
if [ "$userspec" != ":" ]; then
|
|
temp="${userspec%:*}"
|
|
[ -n "$temp" ] && userandgroup="$userandgroup --uid-owner $temp"
|
|
temp="${userspec#*:}"
|
|
[ -n "$temp" ] && userandgroup="$userandgroup --gid-owner $temp"
|
|
fi
|
|
;;
|
|
!*)
|
|
[ "$userspec" != "!" ] && userandgroup="$userandgroup ! --uid-owner ${userspec#!}"
|
|
;;
|
|
*)
|
|
[ -n "$userspec" ] && userandgroup="$userandgroup --uid-owner $userspec"
|
|
;;
|
|
esac
|
|
|
|
[ "$userandgroup" = "-m owner" ] && userandgroup=
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Process the RATE/LIMIT column contents
|
|
#
|
|
process_ratelimit() {
|
|
[ "x$ratelimit" = "x-" ] && ratelimit=
|
|
|
|
if [ -n "$ratelimit" ]; then
|
|
case $ratelimit in
|
|
*:*)
|
|
ratelimit="-m limit --limit ${ratelimit%:*} --limit-burst ${ratelimit#*:}"
|
|
;;
|
|
*)
|
|
ratelimit="-m limit --limit $ratelimit"
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Combine a source/dest from the macro body with one from the macro invocation
|
|
#
|
|
merge_macro_source_dest() # $1 = source/dest from macro body, $2 = source/dest from invocation
|
|
{
|
|
case $2 in
|
|
-)
|
|
echo ${1}
|
|
;;
|
|
*.*.*|+*|~*|!~*)
|
|
#
|
|
# Value in the invocation is an address -- put it behind the value from the macro
|
|
#
|
|
echo ${1}:${2}
|
|
;;
|
|
*)
|
|
echo ${2}:${1}
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Process a record from the rules file
|
|
#
|
|
process_rule() # $1 = target
|
|
# $2 = clients
|
|
# $3 = servers
|
|
# $4 = protocol
|
|
# $5 = ports
|
|
# $6 = cports
|
|
# $7 = address
|
|
# $8 = ratelimit
|
|
# $9 = userspec
|
|
{
|
|
local target="$1"
|
|
local clients="$2"
|
|
local servers="$3"
|
|
local protocol="$4"
|
|
local ports="$5"
|
|
local cports="$6"
|
|
local address="$7"
|
|
local ratelimit="$8"
|
|
local userspec="$9"
|
|
local userandgroup=
|
|
local logtag=
|
|
local nonat=
|
|
|
|
# # # # # F u n c t i o n B o d y # # # # #
|
|
|
|
process_ratelimit
|
|
|
|
# Isolate log level
|
|
|
|
if [ "$target" = "${target%:*}" ]; then
|
|
loglevel=
|
|
else
|
|
loglevel="${target#*:}"
|
|
target="${target%%:*}"
|
|
if [ "$loglevel" != "${loglevel%:*}" ]; then
|
|
logtag="${loglevel#*:}"
|
|
loglevel="${loglevel%:*}"
|
|
fi
|
|
|
|
case $loglevel in
|
|
none*)
|
|
loglevel=
|
|
[ $target = LOG ] && return
|
|
;;
|
|
esac
|
|
|
|
loglevel=${loglevel%\!}
|
|
fi
|
|
#
|
|
# Save the original target in 'logtarget' for logging rules
|
|
#
|
|
logtarget=${target%-}
|
|
#
|
|
# Targets ending in "-" only apply to the nat table
|
|
#
|
|
[ $target = $logtarget ] && dnat_only= || dnat_only=Yes
|
|
|
|
# Tranform the rule:
|
|
#
|
|
# - parse the user specification
|
|
# - set 'target' to the filter table target.
|
|
# - make $FW the destination for REDIRECT
|
|
# - remove '-' suffix from logtargets while setting 'dnat_only'
|
|
# - clear 'address' if it has been set to '-'
|
|
|
|
[ "x$address" = "x-" ] && address=
|
|
|
|
process_userspec
|
|
|
|
case $target in
|
|
*!)
|
|
target=${target%!}
|
|
;;
|
|
ACCEPT+|NONAT)
|
|
[ $SECTION = NEW ] || fatal_error "$target rules are not allowed in the $SECTION SECTION"
|
|
nonat=Yes
|
|
target=ACCEPT
|
|
;;
|
|
ACCEPT|LOG)
|
|
;;
|
|
DROP)
|
|
[ -n "$ratelimit" ] && fatal_error "Rate Limiting not available with DROP"
|
|
;;
|
|
REJECT)
|
|
target=reject
|
|
;;
|
|
CONTINUE)
|
|
target=RETURN
|
|
;;
|
|
DNAT*|SAME*)
|
|
[ $SECTION = NEW ] || fatal_error "$target rules are not allowed in the $SECTION SECTION"
|
|
target=ACCEPT
|
|
address=${address:=detect}
|
|
;;
|
|
REDIRECT*)
|
|
[ $SECTION = NEW ] || fatal_error "REDIRECT rules are not allowed in the $SECTION SECTION"
|
|
target=ACCEPT
|
|
address=${address:=all}
|
|
if [ "x-" = "x$servers" ]; then
|
|
servers=$FW
|
|
else
|
|
servers="$FW::$servers"
|
|
fi
|
|
;;
|
|
*-)
|
|
[ $SECTION = NEW ] || fatal_error "$target rules are not allowed in the $SECTION SECTION"
|
|
;;
|
|
esac
|
|
|
|
# Parse and validate source
|
|
|
|
if [ "$clients" = "${clients%:*}" ]; then
|
|
clientzone="$clients"
|
|
clients=
|
|
else
|
|
clientzone="${clients%%:*}"
|
|
clients="${clients#*:}"
|
|
[ -z "$clientzone" -o -z "$clients" ] && \
|
|
fatal_error "Empty source zone or qualifier: rule \"$rule\""
|
|
fi
|
|
|
|
excludesource=
|
|
|
|
case $clients in
|
|
*!*!*)
|
|
fatal_error "Invalid SOURCE in rule \"$rule\""
|
|
;;
|
|
!*)
|
|
if [ $(list_count $clients) -gt 1 ]; then
|
|
excludesource=${clients#!}
|
|
clients=
|
|
fi
|
|
;;
|
|
*!*)
|
|
excludesource=${clients#*!}
|
|
clients=${clients%!*}
|
|
;;
|
|
esac
|
|
|
|
validate_zone $clientzone || fatal_error "Undefined Client Zone in rule \"$rule\""
|
|
|
|
source=$clientzone
|
|
|
|
if [ $source != $FW -a -n "$userspec" ]; then
|
|
fatal_error "Invalid use of a user-qualification: rule \"$rule\""
|
|
fi
|
|
|
|
# Parse and validate destination
|
|
|
|
if [ "$servers" = "${servers%:*}" ] ; then
|
|
serverzone="$servers"
|
|
servers=
|
|
serverport=
|
|
else
|
|
serverzone="${servers%%:*}"
|
|
servers="${servers#*:}"
|
|
if [ "$servers" != "${servers%:*}" ] ; then
|
|
serverport="${servers#*:}"
|
|
servers="${servers%:*}"
|
|
[ -z "$serverzone" -o -z "$serverport" ] && \
|
|
fatal_error "Empty destination zone or server port: rule \"$rule\""
|
|
if [ $(list_count $servers) -gt 1 ]; then
|
|
case $servers in
|
|
!*)
|
|
fatal_error "Exclude lists not supported in the DEST column"
|
|
;;
|
|
esac
|
|
fi
|
|
else
|
|
serverport=
|
|
[ -z "$serverzone" -o -z "$servers" ] && \
|
|
fatal_error "Empty destination zone or qualifier: rule \"$rule\""
|
|
fi
|
|
fi
|
|
|
|
excludedest=
|
|
|
|
case $servers in
|
|
*!*!*)
|
|
fatal_error "Invalid DEST in rule \"$rule\""
|
|
;;
|
|
!*)
|
|
if [ $(list_count $servers) -gt 1 ]; then
|
|
excludedest=${servers#*!}
|
|
servers=
|
|
fi
|
|
;;
|
|
*!*)
|
|
excludedest=${servers#*!}
|
|
servers=${servers%!*}
|
|
;;
|
|
esac
|
|
|
|
if ! validate_zone $serverzone; then
|
|
fatal_error "Undefined Server Zone in rule \"$rule\""
|
|
fi
|
|
|
|
dest=$serverzone
|
|
|
|
# Ensure that this rule doesn't apply to a NONE policy pair of zones
|
|
|
|
chain=${source}2${dest}
|
|
|
|
# If we have one or more exclusion lists, we will create a new chain and
|
|
# store it's name in 'chain'. We still want log rules to reflect the
|
|
# canonical chain so we store it's name in $logchain.
|
|
|
|
logchain=$chain
|
|
|
|
eval policy=\$${chain}_policy
|
|
|
|
[ -z "$policy" ] && \
|
|
fatal_error "No policy defined from zone $source to zone $dest"
|
|
|
|
[ $policy = NONE ] && \
|
|
fatal_error "Rules may not override a NONE policy: rule \"$rule\""
|
|
|
|
[ "x$protocol" = "x-" ] && protocol=all || protocol=${protocol:=all}
|
|
|
|
ensurechain $chain
|
|
|
|
# Generate Netfilter rule(s)
|
|
|
|
case $logtarget in
|
|
DNAT*|SAME)
|
|
|
|
if [ -n "$XMULTIPORT" ] && \
|
|
! list_search $protocol "icmp" "ICMP" "1" && \
|
|
[ $(( $(list_count $ports) + $(list_count1 $(split $ports ) ) )) -le 16 -a \
|
|
$(( $(list_count $cports) + $(list_count1 $(split $cports ) ) )) -le 16 ]
|
|
then
|
|
#
|
|
# Extended MULTIPORT is enabled, and less than
|
|
# 16 ports are listed (port ranges count as two ports) - use multiport match.
|
|
#
|
|
multioption="-m multiport"
|
|
for client in $(separate_list ${clients:=-}); do
|
|
#
|
|
# add_a_rule() modifies these so we must set their values each time
|
|
#
|
|
server=${servers:=-}
|
|
port=${ports:=-}
|
|
cport=${cports:=-}
|
|
add_a_rule
|
|
done
|
|
elif [ -n "$MULTIPORT" ] && \
|
|
! list_search $protocol "icmp" "ICMP" "1" && \
|
|
[ "$ports" = "${ports%:*}" -a \
|
|
"$cports" = "${cports%:*}" -a \
|
|
$(list_count $ports) -le 15 -a \
|
|
$(list_count $cports) -le 15 ]
|
|
then
|
|
#
|
|
# MULTIPORT is enabled, there are no port ranges in the rule and less than
|
|
# 16 ports are listed - use multiport match.
|
|
#
|
|
multioption="-m multiport"
|
|
for client in $(separate_list ${clients:=-}); do
|
|
#
|
|
# add_a_rule() modifies these so we must set their values each time
|
|
#
|
|
server=${servers:=-}
|
|
port=${ports:=-}
|
|
cport=${cports:=-}
|
|
add_a_rule
|
|
done
|
|
else
|
|
#
|
|
# MULTIPORT is disabled or the rule isn't compatible with multiport match
|
|
#
|
|
multioption=
|
|
for client in $(separate_list ${clients:=-}); do
|
|
for port in $(separate_list ${ports:=-}); do
|
|
for cport in $(separate_list ${cports:=-}); do
|
|
server=${servers:=-}
|
|
add_a_rule
|
|
done
|
|
done
|
|
done
|
|
fi
|
|
;;
|
|
*)
|
|
|
|
if [ -n "$XMULTIPORT" ] && \
|
|
! list_search $protocol "icmp" "ICMP" "1" && \
|
|
[ $(( $(list_count $ports) + $(list_count1 $(split $ports ) ) )) -le 16 -a \
|
|
$(( $(list_count $cports) + $(list_count1 $(split $cports ) ) )) -le 16 ]
|
|
then
|
|
#
|
|
# Extended MULTIPORT is enabled, and less than
|
|
# 16 ports are listed (port ranges count as two ports) - use multiport match.
|
|
#
|
|
multioption="-m multiport"
|
|
for client in $(separate_list ${clients:=-}); do
|
|
for server in $(separate_list ${servers:=-}); do
|
|
#
|
|
# add_a_rule() modifies these so we must set their values each time
|
|
#
|
|
port=${ports:=-}
|
|
cport=${cports:=-}
|
|
add_a_rule
|
|
done
|
|
done
|
|
elif [ -n "$MULTIPORT" ] && \
|
|
! list_search $protocol "icmp" "ICMP" "1" && \
|
|
[ "$ports" = "${ports%:*}" -a \
|
|
"$cports" = "${cports%:*}" -a \
|
|
$(list_count $ports) -le 15 -a \
|
|
$(list_count $cports) -le 15 ]
|
|
then
|
|
#
|
|
# MULTIPORT is enabled, there are no port ranges in the rule and less than
|
|
# 16 ports are listed - use multiport match.
|
|
#
|
|
multioption="-m multiport"
|
|
for client in $(separate_list ${clients:=-}); do
|
|
for server in $(separate_list ${servers:=-}); do
|
|
#
|
|
# add_a_rule() modifies these so we must set their values each time
|
|
#
|
|
port=${ports:=-}
|
|
cport=${cports:=-}
|
|
add_a_rule
|
|
done
|
|
done
|
|
else
|
|
#
|
|
# MULTIPORT is disabled or the rule isn't compatible with multiport match
|
|
#
|
|
multioption=
|
|
for client in $(separate_list ${clients:=-}); do
|
|
for server in $(separate_list ${servers:=-}); do
|
|
for port in $(separate_list ${ports:=-}); do
|
|
for cport in $(separate_list ${cports:=-}); do
|
|
add_a_rule
|
|
done
|
|
done
|
|
done
|
|
done
|
|
fi
|
|
;;
|
|
esac
|
|
#
|
|
# Report Result
|
|
#
|
|
progress_message " Rule \"$rule\" $DONE."
|
|
save_progress_message_short " Rule \\\"$rule\\\" added."
|
|
}
|
|
|
|
#
|
|
# Process a macro invocation in the rules file
|
|
#
|
|
|
|
process_macro() # $1 = target
|
|
# $2 = param
|
|
# $2 = clients
|
|
# $3 = servers
|
|
# $4 = protocol
|
|
# $5 = ports
|
|
# $6 = cports
|
|
# $7 = address
|
|
# $8 = ratelimit
|
|
# $9 = userspec
|
|
{
|
|
local itarget="$1"
|
|
local param="$2"
|
|
local iclients="$3"
|
|
local iservers="$4"
|
|
local iprotocol="$5"
|
|
local iports="$6"
|
|
local icports="$7"
|
|
local iaddress="$8"
|
|
local iratelimit="$9"
|
|
local iuserspec="${10}"
|
|
|
|
progress_message "..Expanding Macro $(find_file macro.${itarget%%:*})..."
|
|
|
|
while read mtarget mclients mservers mprotocol mports mcports mratelimit muserspec; do
|
|
mtarget=$(merge_levels $itarget $mtarget)
|
|
|
|
case $mtarget in
|
|
PARAM|PARAM:*)
|
|
[ -n "$param" ] && mtarget=$(substitute_action $param $mtarget) || fatal_error "PARAM requires that a parameter be supplied in macro invocation"
|
|
;;
|
|
esac
|
|
|
|
case ${mtarget%%:*} in
|
|
ACCEPT|ACCEPT!|ACCEPT+|NONAT|DROP|DROP!|REJECT|REJECT!|DNAT|DNAT-|REDIRECT|REDIRECT-|LOG|CONTINUE|QUEUE|SAME|SAME-)
|
|
;;
|
|
*)
|
|
if list_search ${mtarget%%:*} $ACTIONS; then
|
|
if ! list_search $mtarget $USEDACTIONS; then
|
|
createactionchain $mtarget
|
|
USEDACTIONS="$USEDACTIONS $mtarget"
|
|
fi
|
|
|
|
mtarget=$(find_logactionchain $mtarget)
|
|
else
|
|
fatal_error "Invalid Action in rule \"$mtarget ${mclients:--} ${mservers:--} ${mprotocol:--} ${mports:--} ${mcports:--} ${xaddress:--} ${mratelimit:--} ${muserspec:--}\""
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
if [ -n "$mclients" ]; then
|
|
case $mclients in
|
|
-|SOURCE)
|
|
mclients=${iclients}
|
|
;;
|
|
DEST)
|
|
mclients=${iservers}
|
|
;;
|
|
*)
|
|
mclients=$(merge_macro_source_dest $mclients $iclients)
|
|
;;
|
|
esac
|
|
else
|
|
mclients=${iclients}
|
|
fi
|
|
|
|
if [ -n "$mservers" ]; then
|
|
case $mservers in
|
|
-|DEST)
|
|
mservers=${iservers}
|
|
;;
|
|
SOURCE)
|
|
mservers=${iclients}
|
|
;;
|
|
*)
|
|
mservers=$(merge_macro_source_dest $mservers $iservers)
|
|
;;
|
|
esac
|
|
else
|
|
mservers=${iservers}
|
|
fi
|
|
|
|
[ -n "$iprotocol" ] && [ "x${iprotocol}" != x- ] && mprotocol=$iprotocol
|
|
[ -n "$iports" ] && [ "x${iports}" != x- ] && mports=$iports
|
|
[ -n "$icports" ] && [ "x${icports}" != x- ] && mcports=$icports
|
|
[ -n "$iratelimit" ] && [ "x${iratelimit}" != x- ] && mratelimit=$iratelimit
|
|
[ -n "$iuserspec" ] && [ "x${iuserspec}" != x- ] && muserspec=$iuserspec
|
|
|
|
rule="$mtarget ${mclients=-} ${mservers:=-} ${mprotocol:=-} ${mports:=-} ${mcports:=-} ${xaddress:=-} ${mratelimit:=-} ${muserspec:=-}"
|
|
process_rule $mtarget $mclients $mservers $mprotocol $mports $mcports ${iaddress:=-} $mratelimit $muserspec
|
|
|
|
done < $TMP_DIR/macro.${itarget%%:*}
|
|
|
|
progress_message "..End Macro"
|
|
|
|
}
|
|
|
|
#
|
|
# Process the rules file
|
|
#
|
|
process_rules()
|
|
{
|
|
local comment= optimize
|
|
#
|
|
# Process a rule where the source or destination is "all"
|
|
#
|
|
process_wildcard_rule() # $1 = Yes, if this is a macro, $2 = Yes if we want intrazone traffic
|
|
{
|
|
local yclients yservers ysourcezone ydestzone ypolicy
|
|
|
|
for yclients in $xclients; do
|
|
for yservers in $xservers; do
|
|
ysourcezone=${yclients%%:*}
|
|
ydestzone=${yservers%%:*}
|
|
if [ "${ysourcezone}" != "${ydestzone}" -o "$2" = Yes ] ; then
|
|
eval ypolicy=\$${ysourcezone}2${ydestzone}_policy
|
|
if [ "$ypolicy" != NONE ]; then
|
|
if [ $optimize -gt 0 ]; then
|
|
eval yloglevel=\$${ysourcezone}2${ydestzone}_loglevel
|
|
if [ -n "$yloglevel" ]; then
|
|
if [ x$ypolicy:$yloglevel = x$xtarget ]; then
|
|
continue
|
|
fi
|
|
elif [ x$ypolicy = x$xtarget ]; then
|
|
continue
|
|
fi
|
|
fi
|
|
if [ "$1" = Yes ]; then
|
|
process_macro $xtarget "$xparam" $yclients $yservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec
|
|
else
|
|
rule="$xtarget $yclients $yservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec"
|
|
process_rule $xtarget $yclients $yservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec
|
|
fi
|
|
fi
|
|
fi
|
|
done
|
|
done
|
|
}
|
|
|
|
do_it() # $1 = "Yes" if the target is a macro.
|
|
{
|
|
local intrazone=
|
|
|
|
if [ -z "$SECTIONS" ]; then
|
|
finish_section ESTABLISHED,RELATED
|
|
SECTIONS="ESTABLISHED RELATED NEW"
|
|
SECTION=NEW
|
|
fi
|
|
|
|
case $xclients in
|
|
all+)
|
|
xclients=all
|
|
intrazone=Yes
|
|
;;
|
|
all+-|all-+)
|
|
xclients=all-
|
|
intrazone=Yes
|
|
;;
|
|
esac
|
|
|
|
case $xservers in
|
|
all+)
|
|
xservers=all
|
|
intrazone=Yes
|
|
;;
|
|
all+-|all-+)
|
|
xservers=all-
|
|
intrazone=Yes
|
|
;;
|
|
esac
|
|
|
|
case $xclients in
|
|
all|all-)
|
|
[ $xclients = all ] && xclients="$ZONES $FW" || xclients="$ZONES"
|
|
|
|
if [ "x$xservers" = xall ]; then
|
|
xservers="$ZONES $FW"
|
|
elif [ "x$xservers" = xall- ]; then
|
|
xservers="$ZONES"
|
|
fi
|
|
|
|
process_wildcard_rule "$1" $intrazone
|
|
return
|
|
;;
|
|
esac
|
|
|
|
case $xservers in
|
|
all|all-)
|
|
xservers="$ZONES $FW"
|
|
process_wildcard_rule "$1" $intrazone
|
|
return
|
|
;;
|
|
esac
|
|
|
|
if [ "$1" = Yes ]; then
|
|
process_macro $xtarget "$xparam" $xclients $xservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec
|
|
else
|
|
rule="$xtarget $xclients $xservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec"
|
|
process_rule $xtarget $xclients $xservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec
|
|
fi
|
|
}
|
|
|
|
while read xtarget xclients xservers xprotocol xports xcports xaddress xratelimit xuserspec; do
|
|
if [ "x$xclients" = xnone -o "x$servers" = xnone ]; then
|
|
rule="$xtarget $xclients $xservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec"
|
|
progress_message " Rule \"$rule\" ignored."
|
|
continue
|
|
fi
|
|
|
|
optimize=$OPTIMIZE;
|
|
|
|
case "${xtarget%%:*}" in
|
|
ACCEPT|ACCEPT+|NONAT|DROP|REJECT|DNAT|DNAT-|REDIRECT|REDIRECT-|LOG|CONTINUE|QUEUE|SAME|SAME-)
|
|
do_it No
|
|
;;
|
|
ACCEPT!|DROP!REJECT!|QUEUE!|CONTINUE!)
|
|
optimize=0
|
|
do_it No
|
|
;;
|
|
COMMENT)
|
|
if [ -n "$COMMENTS" ]; then
|
|
comment=$(echo $xclients $xservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec)
|
|
save_command COMMENT=\"$comment\"
|
|
else
|
|
error_message "COMMENT ignored -- requires comment support in iptables/Netfilter"
|
|
fi
|
|
continue
|
|
;;
|
|
SECTION)
|
|
list_search $xclients $SECTIONS && fatal_error "Duplicate or out of order SECTION $xclients"
|
|
|
|
case $xclients in
|
|
ESTABLISHED)
|
|
SECTIONS=ESTABLISHED
|
|
;;
|
|
RELATED)
|
|
finish_section ESTABLISHED
|
|
SECTIONS="ESTABLISHED RELATED"
|
|
;;
|
|
NEW)
|
|
[ $SECTION = RELATED ] && finish_section RELATED || finish_section ESTABLISHED,RELATED
|
|
SECTIONS="ESTABLISHED RELATED NEW"
|
|
;;
|
|
*)
|
|
fatal_error "Invalid SECTION $xclients"
|
|
;;
|
|
esac
|
|
|
|
[ -n "$xservers" ] && fatal_error "Invalid SECTION $xclients $xservers"
|
|
|
|
SECTION=$xclients
|
|
;;
|
|
*)
|
|
if list_search ${xtarget%%:*} $ACTIONS; then
|
|
if ! list_search $xtarget $USEDACTIONS; then
|
|
createactionchain $xtarget
|
|
USEDACTIONS="$USEDACTIONS $xtarget"
|
|
fi
|
|
|
|
xtarget=$(find_logactionchain $xtarget)
|
|
do_it No
|
|
else
|
|
xtarget1=$(map_old_action ${xtarget%%:*})
|
|
|
|
case $xtarget1 in
|
|
*/*)
|
|
xparam=${xtarget1#*/}
|
|
xtarget1=${xtarget1%%/*}
|
|
xtarget=$(substitute_action $xtarget1 $xtarget)
|
|
;;
|
|
*)
|
|
xparam=
|
|
;;
|
|
esac
|
|
|
|
f=macro.$xtarget1
|
|
|
|
if [ -f $TMP_DIR/$f ]; then
|
|
do_it Yes
|
|
else
|
|
fn=$(find_file $f)
|
|
|
|
if [ -f $fn ]; then
|
|
strip_file $f $fn
|
|
do_it Yes
|
|
else
|
|
rule="$xtarget $xclients $xservers $xprotocol $xports $xcports $xaddress $xratelimit $xuserspec"
|
|
fatal_error "Invalid Action in rule \"$rule\""
|
|
fi
|
|
fi
|
|
fi
|
|
;;
|
|
|
|
esac
|
|
|
|
done < $TMP_DIR/rules
|
|
#
|
|
# Just in case the file ended with a comment
|
|
#
|
|
if [ -n "$COMMENTS" ]; then
|
|
save_command
|
|
save_command COMMENT=
|
|
fi
|
|
|
|
case $SECTION in
|
|
ESTABLISHED)
|
|
finish_section ESTABLISHED,RELATED
|
|
;;
|
|
RELATED)
|
|
finish_section RELATED
|
|
;;
|
|
esac
|
|
|
|
SECTION=DONE
|
|
}
|
|
|
|
#
|
|
# Process a default macro
|
|
#
|
|
process_default_macro() # $1 = macro name
|
|
{
|
|
local macro=$1
|
|
local address=
|
|
local multioption=
|
|
local servport=
|
|
local chain=$1
|
|
local logchain=$1
|
|
local userandgroup=
|
|
local logtag=
|
|
local excludesource=
|
|
local target client server protocol port cport ratelimit userspec rule
|
|
local f=$(find_file macro.${macro})
|
|
|
|
havechain $macro && fatal_error "Illegal duplicate default macro name: $macro"
|
|
|
|
createchain $macro no
|
|
strip_file macro.$macro $f
|
|
progress_message "..Expanding Default Macro $f into chain $macro..."
|
|
|
|
while read target client server protocol port cport ratelimit userspec; do
|
|
rule="$target ${client:--} ${server:--} ${protocol:--} ${port:--} ${cport:--} ${ratelimit:--} ${userspec:--}"
|
|
|
|
case $target in
|
|
PARAM|PARAM:*)
|
|
fatal_error "Invalid target ($target) in default macro $macro"
|
|
;;
|
|
esac
|
|
|
|
case ${target} in
|
|
ACCEPT|DROP|REJECT)
|
|
;;
|
|
*)
|
|
if ! list_search $target $USEDACTIONS; then
|
|
if list_search $target $ACTIONS; then
|
|
createactionchain $target
|
|
USEDACTIONS="$USEDACTIONS $target"
|
|
else
|
|
fatal_error "Invalid target ($target) in default macro $macro"
|
|
fi
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
if [ $(list_count ${port}${cport}) -gt 1 ]; then
|
|
multioption="-m multiport"
|
|
fi
|
|
|
|
if [ -n "$client" ]; then
|
|
case $client in
|
|
-|SOURCE)
|
|
client=
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
if [ -n "$server" ]; then
|
|
case $server in
|
|
-|DEST)
|
|
server=
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
process_userspec
|
|
|
|
process_ratelimit
|
|
|
|
add_a_rule
|
|
progress_message "Rule \"$target $protocol $port $cport $ratelimit $userspec\" $DONE"
|
|
|
|
done < $TMP_DIR/macro.$macro
|
|
|
|
progress_message "..End Macro"
|
|
|
|
}
|
|
|
|
#
|
|
# Process a record from the tos file
|
|
#
|
|
# The caller has loaded the column contents from the record into the following
|
|
# variables:
|
|
#
|
|
# src dst protocol sport dport tos
|
|
#
|
|
# and has loaded a space-separated list of their values in "rule". The caller
|
|
# has also set the variable 'chain' to contain the name of the mangle table
|
|
# chain where forward rules are to be in placed in.
|
|
#
|
|
process_tos_rule() {
|
|
#
|
|
# Parse the contents of the 'src' variable
|
|
#
|
|
if [ "$src" = "${src%:*}" ]; then
|
|
srczone="$src"
|
|
src=
|
|
else
|
|
srczone="${src%:*}"
|
|
src="${src#*:}"
|
|
fi
|
|
|
|
source=
|
|
#
|
|
# Validate the source zone
|
|
#
|
|
if validate_zone $srczone; then
|
|
source=$srczone
|
|
elif [ "$srczone" = "all" ]; then
|
|
source="all"
|
|
else
|
|
error_message "WARNING: Undefined Source Zone - rule \"$rule\" ignored"
|
|
return
|
|
fi
|
|
|
|
[ -n "$src" ] && case "$src" in
|
|
*.*.*|+*|!+*)
|
|
#
|
|
# IP Address or networks
|
|
#
|
|
src="$(source_ip_range $src)"
|
|
;;
|
|
~*|!~*)
|
|
src=$(mac_match $src)
|
|
;;
|
|
*)
|
|
#
|
|
# Assume that this is a device name
|
|
#
|
|
if ! verify_interface $src ; then
|
|
error_message "WARNING: Unknown Interface in rule \"$rule\" ignored"
|
|
return
|
|
fi
|
|
|
|
src="$(match_source_dev $src)"
|
|
;;
|
|
esac
|
|
|
|
#
|
|
# Parse the contents of the 'dst' variable
|
|
#
|
|
if [ "$dst" = "${dst%:*}" ]; then
|
|
dstzone="$dst"
|
|
dst=
|
|
else
|
|
dstzone="${dst%:*}"
|
|
dst="${dst#*:}"
|
|
fi
|
|
|
|
dest=
|
|
#
|
|
# Validate the destination zone
|
|
#
|
|
if validate_zone $dstzone; then
|
|
dest=$dstzone
|
|
elif [ "$dstzone" = "all" ]; then
|
|
dest="all"
|
|
else
|
|
error_message \
|
|
"WARNING: Undefined Destination Zone - rule \"$rule\" ignored"
|
|
return
|
|
fi
|
|
|
|
[ -n "$dst" ] && case "$dst" in
|
|
*.*.*|+*|!+*)
|
|
#
|
|
# IP Address or networks
|
|
#
|
|
;;
|
|
*)
|
|
#
|
|
# Assume that this is a device name
|
|
#
|
|
error_message \
|
|
"WARNING: Invalid Destination - rule \"$rule\" ignored"
|
|
return
|
|
;;
|
|
esac
|
|
|
|
#
|
|
# Setup PROTOCOL and PORT variables
|
|
#
|
|
sports=""
|
|
dports=""
|
|
|
|
case $protocol in
|
|
tcp|udp|TCP|UDP|6|17)
|
|
[ -n "$sport" ] && [ "x${sport}" != "x-" ] && \
|
|
sports="--sport $sport"
|
|
[ -n "$dport" ] && [ "x${dport}" != "x-" ] && \
|
|
dports="--dport $dport"
|
|
;;
|
|
icmp|ICMP|0)
|
|
[ -n "$dport" ] && [ "x${dport}" != "x-" ] && \
|
|
dports="--icmp-type $dport"
|
|
;;
|
|
all|ALL)
|
|
protocol=
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
|
|
protocol="${protocol:+-p $protocol}"
|
|
|
|
tos="-j TOS --set-tos $tos"
|
|
|
|
case "$dstzone" in
|
|
all|ALL)
|
|
dst=0.0.0.0/0
|
|
;;
|
|
*)
|
|
if [ -z "$MANGLE_FORWARD" ]; then
|
|
error_message "WARNING: A zone name in the DEST column requires Mangle FORWARD Chain support in your kernel and iptables: rule \"$rule\" ignored"
|
|
return
|
|
fi
|
|
|
|
[ -z "$dst" ] && eval dst=\$${dstzone}_hosts
|
|
;;
|
|
esac
|
|
|
|
for dest in $dst; do
|
|
dest="$(match_dest $dest)"
|
|
|
|
case $srczone in
|
|
$FW)
|
|
run_iptables2 -t mangle -A outtos \
|
|
$protocol $dest $dports $sports $tos
|
|
;;
|
|
all|ALL)
|
|
run_iptables2 -t mangle -A outtos \
|
|
$protocol $dest $dports $sports $tos
|
|
run_iptables2 -t mangle -A $chain \
|
|
$protocol $dest $dports $sports $tos
|
|
;;
|
|
*)
|
|
if [ -n "$src" ]; then
|
|
run_iptables2 -t mangle -A $chain $src \
|
|
$protocol $dest $dports $sports $tos
|
|
else
|
|
eval hosts=\$${srczone}_hosts
|
|
|
|
for host in $hosts; do
|
|
run_iptables2 -t mangle -A $chain $(match_source $host) \
|
|
$protocol $dest $dports $sports $tos
|
|
done
|
|
fi
|
|
;;
|
|
esac
|
|
done
|
|
|
|
progress_message " Rule \"$rule\" $DONE."
|
|
save_progress_message "Rule \\\"$rule\\\" Added."
|
|
}
|
|
|
|
#
|
|
# Process the tos file
|
|
#
|
|
process_tos() # $1 = name of tos file
|
|
{
|
|
local chain=pretos stdchain=PREROUTING
|
|
|
|
if [ -n "$MANGLE_FORWARD" ]; then
|
|
chain=fortos
|
|
stdchain=FORWARD
|
|
fi
|
|
|
|
if [ -s $TMP_DIR/tos ] ; then
|
|
|
|
save_progress_message "Setting up TOS..."
|
|
|
|
progress_message2 "$DOING $1..."
|
|
|
|
createmanglechain $chain
|
|
createmanglechain outtos
|
|
|
|
while read src dst protocol sport dport tos; do
|
|
rule="$(echo $src $dst $protocol $sport $dport $tos)"
|
|
process_tos_rule
|
|
done < $TMP_DIR/tos
|
|
|
|
run_iptables -t mangle -A $stdchain -j $chain
|
|
run_iptables -t mangle -A OUTPUT -j outtos
|
|
fi
|
|
}
|
|
|
|
policy_rules() # $1 = chain to add rules to
|
|
# $2 = policy
|
|
# $3 = loglevel
|
|
# $4 = Default Action/Macro
|
|
{
|
|
local target="$2"
|
|
local default="$4"
|
|
|
|
if [ -n "$default" ]; then
|
|
[ "$default" = none ] || run_iptables -A $1 -j $default
|
|
fi
|
|
|
|
|
|
if [ $# -ge 3 -a "x${3}" != "x-" ]; then
|
|
log_rule $3 $1 $2
|
|
fi
|
|
|
|
if [ -n "$target" ]; then
|
|
case $target in
|
|
REJECT)
|
|
run_iptables -A $1 -j reject
|
|
;;
|
|
CONTINUE)
|
|
;;
|
|
*)
|
|
run_iptables -A $1 -j $target
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Generate default policy & log level rules for the passed client & server
|
|
# zones
|
|
#
|
|
# This function is only called when the canonical chain for this client/server
|
|
# pair is known to exist. If the default policy for this pair specifies the
|
|
# same chain then we add the policy (and logging) rule to the canonical chain;
|
|
# otherwise add a rule to the canonical chain to jump to the appropriate
|
|
# policy chain.
|
|
#
|
|
default_policy() # $1 = client $2 = server
|
|
{
|
|
local chain="${1}2${2}"
|
|
local policy=
|
|
local loglevel=
|
|
local chain1
|
|
|
|
jump_to_policy_chain() {
|
|
#
|
|
# Add a jump to from the canonical chain to the policy chain. On return,
|
|
# $chain is set to the name of the policy chain
|
|
#
|
|
run_iptables -A $chain -j $chain1
|
|
chain=$chain1
|
|
}
|
|
|
|
report_syn_flood_protection()
|
|
{
|
|
progress_message " Enabled SYN flood protection"
|
|
}
|
|
|
|
apply_default()
|
|
{
|
|
#
|
|
# Generate policy file column values for the policy chain
|
|
#
|
|
eval policy=\$${chain1}_policy
|
|
eval loglevel=\$${chain1}_loglevel
|
|
eval synparams=\$${chain1}_synparams
|
|
eval default=\$${chain1}_default
|
|
#
|
|
# Add the appropriate rules to the canonical chain ($chain) to enforce
|
|
# the specified policy
|
|
|
|
if [ "$chain" = "$chain1" ]; then
|
|
#
|
|
# The policy chain is the canonical chain; add policy rule to it
|
|
# The syn flood jump has already been added if required.
|
|
#
|
|
policy_rules $chain $policy "${loglevel:--}" $default
|
|
else
|
|
#
|
|
# The policy chain is different from the canonical chain -- approach
|
|
# depends on the policy
|
|
#
|
|
case $policy in
|
|
ACCEPT|QUEUE)
|
|
if [ -n "$synparams" ]; then
|
|
#
|
|
# To avoid double-counting SYN packets, enforce the policy
|
|
# in this chain.
|
|
#
|
|
report_syn_flood_protection
|
|
policy_rules $chain $policy "${loglevel:--}" $default
|
|
else
|
|
#
|
|
# No problem with double-counting so just jump to the
|
|
# policy chain.
|
|
#
|
|
jump_to_policy_chain
|
|
fi
|
|
;;
|
|
CONTINUE)
|
|
#
|
|
# Silly to jump to the policy chain -- add any logging
|
|
# rules and enable SYN flood protection if requested
|
|
#
|
|
[ -n "$synparams" ] && \
|
|
report_syn_flood_protection
|
|
policy_rules $chain $policy "${loglevel:--}" $default
|
|
;;
|
|
*)
|
|
#
|
|
# DROP or REJECT policy -- enforce in the policy chain and
|
|
# enable SYN flood protection if requested.
|
|
#
|
|
[ -n "$synparams" ] && \
|
|
report_syn_flood_protection
|
|
jump_to_policy_chain
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
progress_message " Policy $policy for $1 to $2 using chain $chain"
|
|
}
|
|
|
|
eval chain1=\$${1}2${2}_policychain
|
|
|
|
if [ -n "$chain1" ]; then
|
|
apply_default $1 $2
|
|
else
|
|
fatal_error "No default policy for zone $1 to zone $2"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Complete a standard chain
|
|
#
|
|
# - run any supplied user exit
|
|
# - search the policy file for an applicable policy and add rules as
|
|
# appropriate
|
|
# - If no applicable policy is found, add rules for an assummed
|
|
# policy of DROP INFO
|
|
#
|
|
complete_standard_chain() # $1 = chain, $2 = source zone, $3 = destination zone
|
|
{
|
|
local policy=
|
|
local loglevel=
|
|
local policychain=
|
|
local default=
|
|
|
|
run_user_exit $1
|
|
|
|
eval policychain=\$${2}2${3}_policychain
|
|
|
|
if [ -n "$policychain" ]; then
|
|
eval policy=\$${policychain}_policy
|
|
eval loglevel=\$${policychain}_loglevel
|
|
eval default=\$${policychain}_default
|
|
eval
|
|
|
|
policy_rules $1 $policy "${loglevel:--}" $default
|
|
else
|
|
policy_rules $1 DROP info $DROP_DEFAULT
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Find the appropriate chain to pass packets from a source zone to a
|
|
# destination zone
|
|
#
|
|
# If the canonical chain for this zone pair exists, echo it's name; otherwise
|
|
# locate and echo the name of the appropriate policy chain
|
|
#
|
|
rules_chain() # $1 = source zone, $2 = destination zone
|
|
{
|
|
local chain=${1}2${2} local policy
|
|
|
|
havechain $chain && { echo $chain; return; }
|
|
|
|
[ "$1" = "$2" ] && { echo ACCEPT; return; }
|
|
|
|
eval chain=\$${chain}_policychain
|
|
|
|
eval policy=\$${chain}_policy
|
|
|
|
if [ "$policy" != CONTINUE ] ; then
|
|
[ -n "$chain" ] && { echo $chain; return; }
|
|
fatal_error "No policy defined for zone $1 to zone $2"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Add a record to the blacklst chain
|
|
#
|
|
# $source = address match
|
|
# $proto = protocol selector
|
|
# $dport = destination port selector
|
|
#
|
|
add_blacklist_rule() {
|
|
run_iptables2 -A blacklst $source $proto $dport -j $target
|
|
}
|
|
|
|
#
|
|
# Process a record from the blacklist file
|
|
#
|
|
# $networks = address/networks
|
|
# $protocol = Protocol Number/Name
|
|
# $port = Port Number/Name
|
|
#
|
|
process_blacklist_rec() {
|
|
local source
|
|
local addr
|
|
local proto
|
|
local dport
|
|
local temp
|
|
local setname
|
|
|
|
for addr in $(separate_list $networks); do
|
|
case $addr in
|
|
-)
|
|
source=
|
|
;;
|
|
~*|!~*)
|
|
addr=$(echo $addr | sed 's/~//;s/-/:/g')
|
|
source="--match mac --mac-source $addr"
|
|
;;
|
|
*)
|
|
source="$(source_ip_range $addr)"
|
|
;;
|
|
esac
|
|
|
|
if [ -n "$protocol" ]; then
|
|
proto=" -p $protocol "
|
|
|
|
case $protocol in
|
|
tcp|TCP|6|udp|UDP|17)
|
|
if [ -n "$ports" ]; then
|
|
if [ -n "$MULTIPORT" -a \
|
|
"$ports" != "${ports%,*}" -a \
|
|
"$ports" = "${ports%:*}" -a \
|
|
$(list_count $ports) -le 15 ]
|
|
then
|
|
dport="-m multiport --dports $ports"
|
|
add_blacklist_rule
|
|
else
|
|
for dport in $(separate_list $ports); do
|
|
dport="--dport $dport"
|
|
add_blacklist_rule
|
|
done
|
|
fi
|
|
else
|
|
add_blacklist_rule
|
|
fi
|
|
;;
|
|
icmp|ICMP|0)
|
|
if [ -n "$ports" ]; then
|
|
for dport in $(separate_list $ports); do
|
|
dport="--icmp-type $dport"
|
|
add_blacklist_rule
|
|
done
|
|
else
|
|
add_blacklist_rule
|
|
fi
|
|
;;
|
|
*)
|
|
add_blacklist_rule
|
|
;;
|
|
esac
|
|
else
|
|
add_blacklist_rule
|
|
fi
|
|
|
|
if [ -n "$ports" ]; then
|
|
addr="$addr $protocol $ports"
|
|
elif [ -n "$protocol" ]; then
|
|
addr="$addr $protocol"
|
|
fi
|
|
|
|
progress_message_and_save " $addr added to Black List"
|
|
done
|
|
}
|
|
|
|
process_blacklist()
|
|
{
|
|
local disposition=$BLACKLIST_DISPOSITION
|
|
local f=$(find_file blacklist)
|
|
local target
|
|
|
|
if [ -s $TMP_DIR/blacklist ]; then
|
|
|
|
[ "$disposition" = REJECT ] && disposition=reject
|
|
|
|
[ -n "$BLACKLIST_LOGLEVEL" ] && target=blacklog || target=$disposition
|
|
|
|
progress_message2 "Compiling $f..."
|
|
|
|
cat >&3 << __EOF__
|
|
#
|
|
# Load the blacklist
|
|
#
|
|
load_blacklist()
|
|
{
|
|
__EOF__
|
|
INDENT=" "
|
|
|
|
while read networks protocol ports; do
|
|
process_blacklist_rec
|
|
done < $TMP_DIR/blacklist
|
|
|
|
INDENT=
|
|
save_command "}"
|
|
save_command
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Setup the Black List
|
|
#
|
|
setup_blacklist() {
|
|
local hosts="$(find_hosts_by_option blacklist)"
|
|
local ipsec policy
|
|
|
|
if [ -n "$hosts" -a -s ${TMP_DIR}/blacklist ]; then
|
|
progress_message2 "$DOING Blacklisting..."
|
|
|
|
createchain blacklst no
|
|
|
|
if [ -n "$BLACKLIST_LOGLEVEL" ]; then
|
|
createchain blacklog no
|
|
log_rule_limit $BLACKLIST_LOGLEVEL blacklog blacklst $BLACKLIST_DISPOSITION "$LOGLIMIT" "" -A
|
|
|
|
if [ $BLACKLIST_DISPOSITION = REJECT ]; then
|
|
run_iptables -A blacklog -j reject
|
|
else
|
|
run_iptables -A blacklog -j $BLACKLIST_DISPOSITION
|
|
fi
|
|
fi
|
|
|
|
[ -n "$BLACKLISTNEWONLY" ] && state="-m state --state NEW,INVALID" || state=
|
|
|
|
for host in $hosts; do
|
|
ipsec=${host%^*}
|
|
host=${host#*^}
|
|
[ -n "$POLICY_MATCH" ] && policy="-m policy --pol $ipsec --dir in" || policy=
|
|
interface=${host%%:*}
|
|
network=${host#*:}
|
|
|
|
for chain in $(first_chains $interface); do
|
|
run_iptables -A $chain $state $(match_source_hosts $network) $policy -j blacklst
|
|
done
|
|
|
|
[ $network = 0/0.0.0.0 ] && network= || network=":$network"
|
|
|
|
progress_message_and_save " Blacklisting enabled on ${interface}${network}"
|
|
done
|
|
|
|
if [ -z "$DELAYBLACKLISTLOAD" -a -s ${TMP_DIR}/blacklist ]; then
|
|
save_command load_blacklist
|
|
fi
|
|
fi
|
|
}
|
|
|
|
# Construct zone-independent rules
|
|
#
|
|
add_common_rules() {
|
|
local savelogparms="$LOGPARMS"
|
|
local broadcasts="$(find_broadcasts) 255.255.255.255 224.0.0.0/4"
|
|
#
|
|
# Populate the smurf chain
|
|
#
|
|
save_progress_message "Setting up SMURF control..."
|
|
|
|
for interface in $(find_bcastdetect_interfaces); do
|
|
indent >&3 << __EOF__
|
|
|
|
ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u | while read address; do
|
|
__EOF__
|
|
[ -n "$SMURF_LOG_LEVEL" ] && \
|
|
indent >&3 << __EOF__
|
|
do_log_rule $SMURF_LOG_LEVEL smurfs DROP -s \$address
|
|
__EOF__
|
|
indent >&3 << __EOF__
|
|
run_iptables -A smurfs -s \$address -j DROP
|
|
done
|
|
|
|
__EOF__
|
|
done
|
|
|
|
for address in $broadcasts ; do
|
|
[ -n "$SMURF_LOG_LEVEL" ] && log_rule $SMURF_LOG_LEVEL smurfs DROP -s $address
|
|
run_iptables -A smurfs $(source_ip_range $address) -j DROP
|
|
done
|
|
#
|
|
# Reject Rules -- Don't respond to broadcasts with an ICMP
|
|
#
|
|
if [ -n "$USEPKTTYPE" ]; then
|
|
run_iptables -A reject -m pkttype --pkt-type broadcast -j DROP
|
|
run_iptables -A reject -m pkttype --pkt-type multicast -j DROP
|
|
else
|
|
for interface in $(find_bcastdetect_interfaces); do
|
|
indent >&3 << __EOF__
|
|
|
|
ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u | while read address; do
|
|
run_iptables -A reject -d \$address -j DROP
|
|
done
|
|
|
|
__EOF__
|
|
done
|
|
|
|
for address in $broadcasts ; do
|
|
run_iptables -A reject -d $address -j DROP
|
|
done
|
|
fi
|
|
#
|
|
# Don't feed the smurfs
|
|
#
|
|
for address in $broadcasts ; do
|
|
run_iptables -A reject -s $address -j DROP
|
|
done
|
|
|
|
run_iptables -A reject -p tcp -j REJECT --reject-with tcp-reset
|
|
run_iptables -A reject -p udp -j REJECT
|
|
#
|
|
# Not all versions of iptables support these so don't complain if they don't work
|
|
#
|
|
if [ -n "$ENHANCED_REJECT" ]; then
|
|
run_iptables -A reject -p icmp -j REJECT --reject-with icmp-host-unreachable
|
|
run_iptables -A reject -j REJECT --reject-with icmp-host-prohibited
|
|
else
|
|
run_iptables -A reject -j REJECT
|
|
fi
|
|
|
|
#
|
|
# Create default action chains
|
|
#
|
|
for action in $USEDACTIONS; do
|
|
createactionchain $action
|
|
done
|
|
|
|
append_file initdone
|
|
|
|
#
|
|
# Process Black List
|
|
#
|
|
save_progress_message "Setting up Black List..."
|
|
|
|
setup_blacklist
|
|
|
|
#
|
|
# SMURFS
|
|
#
|
|
hosts=$(find_hosts_by_option nosmurfs)
|
|
|
|
if [ -n "$hosts" ]; then
|
|
|
|
progress_message2 "Adding Anti-smurf Rules"
|
|
|
|
save_progress_message "Adding Anti-smurf Jumps..."
|
|
|
|
for host in $hosts; do
|
|
ipsec=${host%^*}
|
|
host=${host#*^}
|
|
[ -n "$POLICY_MATCH" ] && policy="-m policy --pol $ipsec --dir in" || policy=
|
|
interface=${host%%:*}
|
|
network=${host#*:}
|
|
|
|
for chain in $(first_chains $interface); do
|
|
run_iptables -A $chain -m state --state NEW,INVALID $(match_source_hosts $network) $policy -j smurfs
|
|
done
|
|
done
|
|
fi
|
|
#
|
|
# DHCP
|
|
#
|
|
interfaces=$(find_interfaces_by_option dhcp)
|
|
|
|
if [ -n "$interfaces" ]; then
|
|
|
|
progress_message2 "Adding rules for DHCP"
|
|
|
|
save_progress_message "Setting up rules for DHCP..."
|
|
|
|
for interface in $interfaces; do
|
|
if [ -n "$BRIDGING" ]; then
|
|
is_bridge=$( brctl show 2> /dev/null | grep "^$interface[[:space:]]" )
|
|
[ -n "$is_bridge" ] && \
|
|
do_iptables -A $(forward_chain $interface) -p udp -o $interface --dport 67:68 -j ACCEPT
|
|
fi
|
|
run_iptables -A $(input_chain $interface) -p udp --dport 67:68 -j ACCEPT
|
|
run_iptables -A $(out_chain $interface) -p udp --dport 67:68 -j ACCEPT
|
|
done
|
|
fi
|
|
#
|
|
# RFC 1918
|
|
#
|
|
hosts="$(find_hosts_by_option norfc1918)"
|
|
|
|
if [ -n "$hosts" ]; then
|
|
progress_message2 "Enabling RFC1918 Filtering"
|
|
|
|
save_progress_message "Setting up RFC1918 Filtering..."
|
|
|
|
createchain norfc1918 no
|
|
|
|
createchain rfc1918 no
|
|
|
|
log_rule $RFC1918_LOG_LEVEL rfc1918 DROP
|
|
|
|
run_iptables -A rfc1918 -j DROP
|
|
|
|
chain=norfc1918
|
|
|
|
if [ -n "$RFC1918_STRICT" ]; then
|
|
#
|
|
# We'll generate two chains - one for source and one for destination
|
|
#
|
|
chain=rfc1918d
|
|
createchain $chain no
|
|
elif [ -n "$MANGLE_ENABLED" -a -z "$CONNTRACK_MATCH" ]; then
|
|
#
|
|
# Mangling is enabled but conntrack match isn't available --
|
|
# create a chain in the mangle table to filter RFC1918 destination
|
|
# addresses. This must be done in the mangle table before we apply
|
|
# any DNAT rules in the nat table
|
|
#
|
|
# Also add a chain to log and drop any RFC1918 packets that we find
|
|
#
|
|
createmanglechain man1918
|
|
createmanglechain rfc1918
|
|
log_rule $RFC1918_LOG_LEVEL rfc1918 DROP -t mangle
|
|
run_iptables -t mangle -A rfc1918 -j DROP
|
|
fi
|
|
|
|
while read networks target; do
|
|
case $target in
|
|
logdrop)
|
|
target=rfc1918
|
|
s_target=rfc1918
|
|
;;
|
|
DROP)
|
|
s_target=DROP
|
|
;;
|
|
RETURN)
|
|
[ -n "$RFC1918_STRICT" ] && s_target=rfc1918d || s_target=RETURN
|
|
;;
|
|
*)
|
|
fatal_error "Invalid target ($target) for $networks"
|
|
;;
|
|
esac
|
|
|
|
for network in $(separate_list $networks); do
|
|
run_iptables2 -A norfc1918 $(source_ip_range $network) -j $s_target
|
|
|
|
if [ -n "$CONNTRACK_MATCH" ]; then
|
|
#
|
|
# We have connection tracking match -- match on the original destination
|
|
#
|
|
run_iptables2 -A $chain -m conntrack --ctorigdst $network -j $target
|
|
elif [ -n "$MANGLE_ENABLED" ]; then
|
|
#
|
|
# No connection tracking match but we have mangling -- add a rule to
|
|
# the mangle table
|
|
#
|
|
run_iptables2 -t mangle -A man1918 $(dest_ip_range $network) -j $target
|
|
fi
|
|
done
|
|
done < $TMP_DIR/rfc1918
|
|
|
|
[ -n "$RFC1918_STRICT" ] && run_iptables -A norfc1918 -j rfc1918d
|
|
|
|
for host in $hosts; do
|
|
ipsec=${host%^*}
|
|
host=${host#*^}
|
|
[ -n "$POLICY_MATCH" ] && policy="-m policy --pol $ipsec --dir in" || policy=
|
|
interface=${host%%:*}
|
|
networks=${host#*:}
|
|
|
|
for chain in $(first_chains $interface); do
|
|
run_iptables -A $chain -m state --state NEW $(match_source_hosts $networks) $policy -j norfc1918
|
|
done
|
|
|
|
[ -n "$MANGLE_ENABLED" -a -z "$CONNTRACK_MATCH" ] && \
|
|
run_iptables -t mangle -A PREROUTING -m state --state NEW -i $interface $(match_source_hosts $networks) $policy -j man1918
|
|
done
|
|
fi
|
|
|
|
hosts=$(find_hosts_by_option tcpflags)
|
|
|
|
if [ -n "$hosts" ]; then
|
|
progress_message2 "$DOING TCP Flags checking..."
|
|
|
|
save_progress_message "Setting up TCP Flags checking..."
|
|
|
|
createchain tcpflags no
|
|
|
|
if [ -n "$TCP_FLAGS_LOG_LEVEL" ]; then
|
|
createchain logflags no
|
|
|
|
savelogparms="$LOGPARMS"
|
|
|
|
[ "$TCP_FLAGS_LOG_LEVEL" = ULOG ] || LOGPARMS="$LOGPARMS --log-ip-options"
|
|
|
|
log_rule $TCP_FLAGS_LOG_LEVEL logflags $TCP_FLAGS_DISPOSITION
|
|
|
|
LOGPARMS="$savelogparms"
|
|
|
|
case $TCP_FLAGS_DISPOSITION in
|
|
REJECT)
|
|
run_iptables -A logflags -j REJECT --reject-with tcp-reset
|
|
;;
|
|
*)
|
|
run_iptables -A logflags -j $TCP_FLAGS_DISPOSITION
|
|
;;
|
|
esac
|
|
|
|
disposition="-j logflags"
|
|
else
|
|
disposition="-j $TCP_FLAGS_DISPOSITION"
|
|
fi
|
|
|
|
run_iptables -A tcpflags -p tcp --tcp-flags ALL FIN,URG,PSH $disposition
|
|
run_iptables -A tcpflags -p tcp --tcp-flags ALL NONE $disposition
|
|
run_iptables -A tcpflags -p tcp --tcp-flags SYN,RST SYN,RST $disposition
|
|
run_iptables -A tcpflags -p tcp --tcp-flags SYN,FIN SYN,FIN $disposition
|
|
#
|
|
# There are a lot of probes to ports 80, 3128 and 8080 that use a source
|
|
# port of 0. This catches them even if they are directed at an IP that
|
|
# hosts a web server.
|
|
#
|
|
run_iptables -A tcpflags -p tcp --syn --sport 0 $disposition
|
|
|
|
for host in $hosts; do
|
|
ipsec=${host%^*}
|
|
host=${host#*^}
|
|
[ -n "$POLICY_MATCH" ] && policy="-m policy --pol $ipsec --dir in" || policy=
|
|
interface=${host%%:*}
|
|
network=${host#*:}
|
|
|
|
for chain in $(first_chains $interface); do
|
|
run_iptables -A $chain -p tcp $(match_source_hosts $network) $policy -j tcpflags
|
|
done
|
|
done
|
|
fi
|
|
#
|
|
# ARP Filtering
|
|
#
|
|
save_progress_message "Setting up ARP filtering..."
|
|
|
|
indent >&3 << __EOF__
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f \$f/arp_filter ] && echo 0 > \$f/arp_filter
|
|
[ -f \$f/arp_ignore ] && echo 0 > \$f/arp_ignore
|
|
done
|
|
|
|
__EOF__
|
|
|
|
interfaces=$(find_interfaces_by_option arp_filter)
|
|
interfaces1=$(find_interfaces_by_option1 arp_ignore)
|
|
|
|
if [ -n "${interfaces}${interfaces1}" ]; then
|
|
progress_message2 "$DOING ARP Filtering..."
|
|
|
|
for interface in $interfaces; do
|
|
file=/proc/sys/net/ipv4/conf/$interface/arp_filter
|
|
indent >&3 << __EOF__
|
|
if [ -f $file ]; then
|
|
echo 1 > $file
|
|
else
|
|
error_message "WARNING: Cannot set ARP filtering on $interface"
|
|
fi
|
|
__EOF__
|
|
done
|
|
|
|
for interface in $interfaces1; do
|
|
file=/proc/sys/net/ipv4/conf/$interface/arp_ignore
|
|
eval value="\$$(chain_base $interface)_arp_ignore"
|
|
indent >&3 << __EOF__
|
|
if [ -f $file ]; then
|
|
echo $value > $file
|
|
else
|
|
error_message "WARNING: Cannot set ARP filtering on $interface"
|
|
fi
|
|
__EOF__
|
|
done
|
|
fi
|
|
#
|
|
# Route Filtering
|
|
#
|
|
interfaces="$(find_interfaces_by_option routefilter)"
|
|
|
|
if [ -n "$interfaces" -o -n "$ROUTE_FILTER" ]; then
|
|
progress_message2 "$DOING Kernel Route Filtering..."
|
|
|
|
save_progress_message "Setting up Route Filtering..."
|
|
|
|
indent >&3 << __EOF__
|
|
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f \$f/log_martians ] && echo 0 > \$f/rp_filter
|
|
done
|
|
|
|
__EOF__
|
|
for interface in $interfaces; do
|
|
file=/proc/sys/net/ipv4/conf/$interface/rp_filter
|
|
|
|
indent >&3 << __EOF__
|
|
if [ -f $file ]; then
|
|
echo 1 > $file
|
|
else
|
|
error_message "WARNING: Cannot set route filtering on $interface"
|
|
fi
|
|
__EOF__
|
|
done
|
|
|
|
save_command "echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter"
|
|
|
|
if [ -n "$ROUTE_FILTER" ]; then
|
|
save_command "echo 1 > /proc/sys/net/ipv4/conf/default/rp_filter"
|
|
save_command "echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter"
|
|
fi
|
|
|
|
save_command "[ -n \"\$NOROUTES\" ] || ip route flush cache"
|
|
fi
|
|
|
|
#
|
|
# Martian Logging
|
|
#
|
|
interfaces="$(find_interfaces_by_option logmartians)"
|
|
|
|
if [ -n "$interfaces" -o -n "$LOG_MARTIANS" ]; then
|
|
progress_message2 "$DOING Martian Logging..."
|
|
|
|
save_progress_message "Setting up Martian Logging..."
|
|
|
|
indent >&3 << __EOF__
|
|
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f \$f/log_martians ] && echo 0 > \$f/log_martians
|
|
done
|
|
|
|
__EOF__
|
|
for interface in $interfaces; do
|
|
file=/proc/sys/net/ipv4/conf/$interface/log_martians
|
|
|
|
indent >&3 << __EOF__
|
|
if [ -f $file ]; then
|
|
echo 1 > $file
|
|
else
|
|
error_message "WARNING: Cannot set Martian logging on $interface"
|
|
fi
|
|
|
|
__EOF__
|
|
done
|
|
|
|
if [ -n "$LOG_MARTIANS" ]; then
|
|
save_command "echo 1 > /proc/sys/net/ipv4/conf/default/log_martians"
|
|
save_command "echo 1 > /proc/sys/net/ipv4/conf/all/log_martians"
|
|
fi
|
|
|
|
fi
|
|
|
|
#
|
|
# Source Routing
|
|
#
|
|
save_progress_message "Setting up Accept Source Routing..."
|
|
|
|
indent >&3 << __EOF__
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f \$f/accept_source_route ] && echo 0 > \$f/accept_source_route
|
|
done
|
|
|
|
__EOF__
|
|
|
|
interfaces=$(find_interfaces_by_option sourceroute)
|
|
|
|
if [ -n "$interfaces" ]; then
|
|
progress_message2 "$DOING Accept Source Routing..."
|
|
|
|
save_progress_message "Setting up Source Routing..."
|
|
|
|
for interface in $interfaces; do
|
|
file=/proc/sys/net/ipv4/conf/$interface/accept_source_route
|
|
|
|
indent >&3 << __EOF__
|
|
if [ -f $file ]; then
|
|
echo 1 > $file
|
|
else
|
|
error_message "WARNING: Cannot set Accept Source Routing on $interface"
|
|
fi
|
|
__EOF__
|
|
done
|
|
fi
|
|
|
|
if [ -n "$DYNAMIC_ZONES" ]; then
|
|
progress_message "$DOING Dynamic Zone Chains..."
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
for chain in $(dynamic_chains $interface); do
|
|
createchain $chain no
|
|
done
|
|
|
|
chain=$(dynamic_in $interface)
|
|
createnatchain $chain
|
|
|
|
run_iptables -A $(input_chain $interface) -j $chain
|
|
run_iptables -A $(forward_chain $interface) -j $(dynamic_fwd $interface)
|
|
run_iptables -A $(out_chain $interface) -j $(dynamic_out $interface)
|
|
done
|
|
fi
|
|
#
|
|
# UPnP
|
|
#
|
|
interfaces=$(find_interfaces_by_option upnp)
|
|
|
|
if [ -n "$interfaces" ]; then
|
|
progress_message2 "$DOING UPnP..."
|
|
|
|
save_progress_message "Setting up UPnP..."
|
|
|
|
createnatchain UPnP
|
|
|
|
for interface in $interfaces; do
|
|
run_iptables -t nat -A PREROUTING -i $interface -j UPnP
|
|
done
|
|
fi
|
|
|
|
setup_forwarding
|
|
}
|
|
|
|
#
|
|
# Scan the policy file defining the necessary chains
|
|
# Add the appropriate policy rule(s) to the end of each canonical chain
|
|
#
|
|
apply_policy_rules() {
|
|
#
|
|
# Create policy chains
|
|
#
|
|
for chain in $ALL_POLICY_CHAINS; do
|
|
eval policy=\$${chain}_policy
|
|
eval loglevel=\$${chain}_loglevel
|
|
eval optional=\$${chain}_is_optional
|
|
eval default=\$${chain}_default
|
|
|
|
if [ "$policy" != NONE ]; then
|
|
if ! havechain $chain && [ -z "$optional" -a "$policy" != CONTINUE ]; then
|
|
#
|
|
# The chain doesn't exist. Create the chain and add policy
|
|
# rules
|
|
#
|
|
createchain $chain yes
|
|
#
|
|
# If either client or server is 'all' then this MUST be
|
|
# a policy chain and we must apply the appropriate policy rules
|
|
#
|
|
# Otherwise, this is a canonical chain which will be handled in
|
|
# the for loop below
|
|
#
|
|
case $chain in
|
|
all2*|*2all)
|
|
run_user_exit $chain
|
|
policy_rules $chain $policy "${loglevel:--}" $default
|
|
;;
|
|
esac
|
|
fi
|
|
fi
|
|
done
|
|
|
|
#
|
|
# Add policy rules to canonical chains
|
|
#
|
|
for zone in $FW $ZONES; do
|
|
for zone1 in $FW $ZONES; do
|
|
chain=${zone}2${zone1}
|
|
if havechain $chain; then
|
|
run_user_exit $chain
|
|
default_policy $zone $zone1
|
|
fi
|
|
done
|
|
done
|
|
}
|
|
|
|
#
|
|
# Activate the rules
|
|
#
|
|
activate_rules()
|
|
{
|
|
local PREROUTING_rule=1
|
|
local POSTROUTING_rule=1
|
|
#
|
|
# Jump to a NAT chain from one of the builtin nat chains
|
|
#
|
|
addnatjump() # $1 = BUILTIN chain, $2 = user chain, $3 - * other arguments
|
|
{
|
|
local sourcechain=$1 destchain=$2
|
|
shift
|
|
shift
|
|
|
|
if havenatchain $destchain ; then
|
|
run_iptables2 -t nat -A $sourcechain $@ -j $destchain
|
|
elif [ -z "$KLUDGEFREE" ]; then
|
|
[ -n "$PHYSDEV_MATCH" -a -f $TMP_DIR/physdev ] && -rm -f $TMP_DIR/physdev
|
|
[ -n "$IPRANGE_MATCH" -a -f $TMP_DIR/iprange ] && rm -f $TMP_DIR/iprange
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Jump to a RULES chain from one of the builtin nat chains. These jumps
|
|
# are inserted before jumps to one-to-one NAT chains.
|
|
#
|
|
addrulejump() # $1 = BUILTIN chain, $2 = user chain, $3 - * other arguments
|
|
{
|
|
local sourcechain=$1 destchain=$2
|
|
shift
|
|
shift
|
|
|
|
if havenatchain $destchain; then
|
|
eval run_iptables2 -t nat -I $sourcechain \
|
|
\$${sourcechain}_rule $@ -j $destchain
|
|
eval ${sourcechain}_rule=\$\(\(\$${sourcechain}_rule + 1\)\)
|
|
elif [ -z "$KLUDGEFREE" ]; then
|
|
[ -n "$PHYSDEV_MATCH" -a -f $TMP_DIR/physdev ] && rm -f $TMP_DIR/physdev
|
|
[ -n "$IPRANGE_MATCH" -a -f $TMP_DIR/iprange ] && rm -f $TMP_DIR/iprange
|
|
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Create a dynamic chain for a zone and jump to it from a second chain
|
|
#
|
|
create_zone_dyn_chain() # $1 = zone, $2 = second chain
|
|
{
|
|
createchain ${1}_dyn No
|
|
run_iptables -A $2 -j ${1}_dyn
|
|
}
|
|
#
|
|
# Insert a set of exclusions at the front of a chain
|
|
#
|
|
insert_exclusions() # $1 = table $2 = chain name, $3 - $n = exclusions
|
|
{
|
|
local t=$1 c=$2 num=0 host1 interface1 networks1
|
|
|
|
shift 2
|
|
|
|
for host1 in $*; do
|
|
interface1=${host1%%:*}
|
|
networks1=${host1#*:}
|
|
num=$(($num + 1))
|
|
run_iptables -t $t -I $c $num -o $interface1 -d $networks1 -j RETURN
|
|
done
|
|
}
|
|
#
|
|
# Add a set of exclusions to the end of a chain
|
|
#
|
|
add_exclusions() # $1 = table $2 = chain name, $3 - $n = exclusions
|
|
{
|
|
local t=$1 c=$2 host1 interface1 networks1
|
|
|
|
shift 2
|
|
|
|
for host1 in $*; do
|
|
interface1=${host1%%:*}
|
|
networks1=${host1#*:}
|
|
run_iptables -t $t -A $c -o $interface1 -d $networks1 -j RETURN
|
|
done
|
|
}
|
|
#
|
|
# E x e c u t i o n S t a r t s H e r e
|
|
#
|
|
# Add jumps to early SNAT chains
|
|
#
|
|
for interface in $ALL_INTERFACES; do
|
|
addnatjump POSTROUTING $(snat_chain $interface) -o $interface
|
|
done
|
|
#
|
|
# Add jumps for dynamic nat chains
|
|
#
|
|
[ -n "$DYNAMIC_ZONES" ] && for interface in $ALL_INTERFACES ; do
|
|
addrulejump PREROUTING $(dynamic_in $interface) -i $interface
|
|
done
|
|
#
|
|
# Add jumps from the builtin chains to the nat chains
|
|
#
|
|
addnatjump PREROUTING nat_in
|
|
addnatjump POSTROUTING nat_out
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
addnatjump PREROUTING $(input_chain $interface) -i $interface
|
|
addnatjump POSTROUTING $(output_chain $interface) -o $interface
|
|
done
|
|
|
|
> $STATEDIR/chains
|
|
echo "$FW firewall" > $STATEDIR/zones
|
|
#
|
|
# Create forwarding chains for complex zones and generate jumps for IPSEC source hosts to that chain.
|
|
#
|
|
for zone in $ZONES; do
|
|
if eval test -n \"\$${zone}_is_complex\" ; then
|
|
frwd_chain=${zone}_frwd
|
|
createchain $frwd_chain No
|
|
|
|
eval exclusions=\"\$${zone}_exclusions\"
|
|
|
|
if [ -n "$exclusions" ]; then
|
|
local num=1
|
|
in_chain=${zone}_input
|
|
out_chain=${zone}_output
|
|
createchain $in_chain No
|
|
createchain $out_chain No
|
|
|
|
if [ "$(rules_chain $zone $zone)" = ACCEPT ]; then
|
|
createchain ${zone}2${zone} yes
|
|
run_iptables -A ${zone}2${zone} -j ACCEPT
|
|
fi
|
|
|
|
for host in $exclusions; do
|
|
interface=${host%%:*}
|
|
address=${host#*:}
|
|
run_iptables -A $frwd_chain -i $interface -s $address -j RETURN
|
|
run_iptables -A $in_chain -i $interface -s $address -j RETURN
|
|
run_iptables -A $out_chain -i $interface -s $address -j RETURN
|
|
done
|
|
fi
|
|
|
|
if [ -n "$POLICY_MATCH" ]; then
|
|
#
|
|
# Because policy match only matches an 'in' or an 'out' policy (but not both), we have to place the
|
|
# '--pol ipsec --dir in' rules at the front of the interface forwarding chains. Otherwise, decrypted packets
|
|
# can match '--pol none --dir out' rules and send the packets down the wrong rules chain.
|
|
#
|
|
eval is_ipsec=\$${zone}_is_ipsec
|
|
|
|
if [ -n "$is_ipsec" ]; then
|
|
eval source_hosts=\$${zone}_hosts
|
|
[ -n "$DYNAMIC_ZONES" ] && create_zone_dyn_chain $zone $frwd_chain
|
|
else
|
|
eval source_hosts=\$${zone}_ipsec_hosts
|
|
[ -n "$DYNAMIC_ZONES" -a -n "$source_hosts" ] && create_zone_dyn_chain $zone $frwd_chain
|
|
fi
|
|
|
|
for host in $source_hosts; do
|
|
interface=${host%%:*}
|
|
networks=${host#*:}
|
|
|
|
run_iptables2 -A $(forward_chain $interface) $(match_source_hosts $networks) $(match_ipsec_in $zone $host) -j $frwd_chain
|
|
done
|
|
fi
|
|
fi
|
|
done
|
|
#
|
|
# Main source zone rule-activation loop
|
|
#
|
|
for zone in $ZONES; do
|
|
eval source_hosts=\$${zone}_hosts
|
|
|
|
chain1=$(rules_chain $FW $zone)
|
|
chain2=$(rules_chain $zone $FW)
|
|
|
|
eval complex=\$${zone}_is_complex
|
|
eval type=\$${zone}_type
|
|
eval exclusions=\"\$${zone}_exclusions\"
|
|
|
|
if [ -n "$exclusions" ]; then
|
|
echo "$zone $type $source_hosts exclude $exclusions" >> $STATEDIR/zones
|
|
else
|
|
echo "$zone $type $source_hosts" >> $STATEDIR/zones
|
|
fi
|
|
|
|
if [ -n "$DYNAMIC_ZONES" ]; then
|
|
echo "$FW $zone $chain1" >> $STATEDIR/chains
|
|
echo "$zone $FW $chain2" >> $STATEDIR/chains
|
|
fi
|
|
|
|
need_broadcast=
|
|
|
|
if [ -n "$complex" ]; then
|
|
frwd_chain=${zone}_frwd
|
|
chain=$(dnat_chain $zone)
|
|
if havenatchain $chain; then
|
|
insert_exclusions nat $chain $exclusions
|
|
fi
|
|
fi
|
|
#
|
|
# Take care of PREROUTING, INPUT and OUTPUT jumps
|
|
#
|
|
for host in $source_hosts; do
|
|
interface=${host%%:*}
|
|
networks=${host#*:}
|
|
|
|
if [ -n "$chain1" ]; then
|
|
if [ -n "$exclusions" ]; then
|
|
run_iptables2 -A $(out_chain $interface) $(match_dest_hosts $networks) $(match_ipsec_out $zone $host) -j ${zone}_output
|
|
run_iptables -A ${zone}_output -j $chain1
|
|
else
|
|
run_iptables2 -A $(out_chain $interface) $(match_dest_hosts $networks) $(match_ipsec_out $zone $host) -j $chain1
|
|
fi
|
|
fi
|
|
#
|
|
# Add jumps from the builtin chain for DNAT rules
|
|
#
|
|
addrulejump PREROUTING $(dnat_chain $zone) -i $interface $(match_source_hosts $networks) $(match_ipsec_in $zone $host)
|
|
|
|
if [ -n "$chain2" ]; then
|
|
if [ -n "$exclusions" ]; then
|
|
run_iptables2 -A $(input_chain $interface) $(match_source_hosts $networks) $(match_ipsec_in $zone $host) -j ${zone}_input
|
|
run_iptables -A ${zone}_input -j $chain2
|
|
else
|
|
run_iptables2 -A $(input_chain $interface) $(match_source_hosts $networks) $(match_ipsec_in $zone $host) -j $chain2
|
|
fi
|
|
fi
|
|
|
|
if [ -n "$complex" ] && ! is_ipsec_host $zone $host ; then
|
|
run_iptables2 -A $(forward_chain $interface) $(match_source_hosts $networks) $(match_ipsec_in $zone $host) -j $frwd_chain
|
|
fi
|
|
|
|
case $networks in
|
|
*.*.*.*|+*)
|
|
if [ "$networks" != 0.0.0.0/0 ]; then
|
|
if ! list_search $interface $need_broadcast ; then
|
|
interface_has_option $interface detectnets && need_broadcast="$need_broadcast $interface"
|
|
fi
|
|
fi
|
|
;;
|
|
esac
|
|
done
|
|
|
|
if [ -n "$chain1" ]; then
|
|
for interface in $need_broadcast ; do
|
|
run_iptables -A $(out_chain $interface) -d 255.255.255.255 -j $chain1
|
|
run_iptables -A $(out_chain $interface) -d 224.0.0.0/4 -j $chain1
|
|
done
|
|
fi
|
|
#
|
|
# F O R W A R D I N G
|
|
#
|
|
temp_zones=
|
|
last_chain=
|
|
|
|
if [ $OPTIMIZE -gt 0 ]; then
|
|
|
|
dest_zones=
|
|
#
|
|
# The following loop attempts to eliminate redundant sequences of jumps to
|
|
# all2all or <source zone>2all. It does so by combining all trailing
|
|
# jumps to the same policy-only chain.
|
|
#
|
|
for zone1 in $ZONES; do
|
|
|
|
eval policy=\$${zone}2${zone1}_policy
|
|
|
|
[ "$policy" = NONE ] && continue
|
|
|
|
chain="$(rules_chain $zone $zone1)"
|
|
|
|
[ -z "$chain" ] && continue # CONTINUE policy and there is no canonical chain.
|
|
|
|
if [ $zone = $zone1 ]; then
|
|
#
|
|
# Try not to generate superfluous intra-zone rules
|
|
#
|
|
eval routeback=\"\$${zone}_routeback\"
|
|
eval interfaces=\"\$${zone}_interfaces\"
|
|
eval ports="\$${zone}_ports"
|
|
|
|
num_ifaces=$(list_count1 $interfaces)
|
|
#
|
|
# If the zone has a single interface then what matters is how many ports it has
|
|
#
|
|
[ $num_ifaces -eq 1 -a -n "$ports" ] && num_ifaces=$(list_count1 $ports)
|
|
#
|
|
# If we don't need to route back and if we have only one interface or one port to
|
|
# the zone then assume that hosts in the zone can communicate directly.
|
|
#
|
|
if [ $num_ifaces -lt 2 -a -z "$routeback" -a -z "$exclusions" ] ; then
|
|
continue
|
|
fi
|
|
fi
|
|
|
|
case $chain in
|
|
*2all)
|
|
#
|
|
# Rules chain is a policy-only chain that could be used more than once (all2all or ${zone}2all
|
|
#
|
|
if [ -n "$last_chain" ]; then
|
|
#
|
|
# And the last rules chain was a policy-only chain
|
|
#
|
|
if [ "$chain" != "$last_chain" ]; then
|
|
#
|
|
# But it was a different one -- back to square 1
|
|
#
|
|
last_chain=$chain
|
|
dest_zones="$dest_zones $temp_zones"
|
|
temp_zones=$zone1
|
|
else
|
|
#
|
|
# Same chain -- add this dest zone to the running list of
|
|
# zones using the same rules chain
|
|
#
|
|
temp_zones="$temp_zones $zone1"
|
|
fi
|
|
elif [ $policy = ACCEPT ]; then
|
|
#
|
|
# We don't wild-card ACCEPT policies -- could open up security holes through interfaces
|
|
# that aren't described in /etc/shorewall/interfaces
|
|
#
|
|
dest_zones="$dest_zones $zone1"
|
|
else
|
|
#
|
|
# First in a potential run of rules using this chain
|
|
#
|
|
last_chain=$chain
|
|
temp_zones=$zone1
|
|
fi
|
|
;;
|
|
*)
|
|
#
|
|
# Not a policy-only chain -- add accumulated sequence of dest zones to those needing processing
|
|
#
|
|
dest_zones="$dest_zones $temp_zones $zone1"
|
|
temp_zones=
|
|
last_chain=
|
|
;;
|
|
esac
|
|
done
|
|
#
|
|
# If there is no reduction in the number of rules then don't bother with the optimization
|
|
#
|
|
if [ -n "$last_chain" -a $(list_count1 $temp_zones) -eq 1 ]; then
|
|
dest_zones="$dest_zones $temp_zones"
|
|
last_chain=
|
|
fi
|
|
else
|
|
dest_zones=$ZONES
|
|
fi
|
|
#
|
|
# We now loop through the destination zones creating jumps to the rules chain for each source/dest combination.
|
|
# $dest_zones is the list of destination zones that we need to handle from this source zone
|
|
#
|
|
for zone1 in $dest_zones; do
|
|
|
|
eval policy=\$${zone}2${zone1}_policy
|
|
|
|
[ "$policy" = NONE ] && continue
|
|
|
|
eval dest_hosts=\$${zone1}_hosts
|
|
eval exclusions1=\"\$${zone1}_exclusions\"
|
|
|
|
chain="$(rules_chain $zone $zone1)"
|
|
|
|
[ -z "$chain" ] && continue # CONTINUE policy and there is no canonical chain.
|
|
|
|
[ -n "$DYNAMIC_ZONES" ] && echo "$zone $zone1 $chain" >> $STATEDIR/chains
|
|
|
|
if [ $zone = $zone1 ]; then
|
|
eval routeback=\"\$${zone}_routeback\"
|
|
eval interfaces=\"\$${zone}_interfaces\"
|
|
eval ports="\$${zone}_ports"
|
|
|
|
num_ifaces=$(list_count1 $interfaces)
|
|
|
|
[ $num_ifaces -eq 1 -a -n "$ports" ] && num_ifaces=$(list_count1 $ports)
|
|
|
|
if [ $num_ifaces -lt 2 -a -z "$routeback" -a -z "$exclusions" ] ; then
|
|
continue
|
|
fi
|
|
else
|
|
routeback=
|
|
num_ifaces=0
|
|
fi
|
|
|
|
if [ -n "$exclusions1" ]; then
|
|
#
|
|
# We handle exclusions in the dest zone by inserting RETURN rules at the front of
|
|
# each rules chain where the zone is the destination
|
|
#
|
|
case $chain in
|
|
all2$zone1)
|
|
#
|
|
# We only want to add the exclusions once
|
|
#
|
|
if eval test -z \"\$${chain}_exclusions\"; then
|
|
eval ${chain}_exclusions=Yes
|
|
insert_exclusions filter $chain $exclusions1
|
|
fi
|
|
;;
|
|
*2all)
|
|
#
|
|
# A policy-only chain -- we create one exclusion chain for this
|
|
# dest zone/chain combination, and re-use
|
|
# it if the occasion presents itself
|
|
#
|
|
eval chain1=\$${chain}_${zone1}_ex
|
|
|
|
if [ -z "$chain1" ]; then
|
|
#
|
|
# Must create the chain
|
|
#
|
|
chain1=excl_${EXCLUSION_SEQ}
|
|
EXCLUSION_SEQ=$(( $EXCLUSION_SEQ + 1 ))
|
|
eval ${chain}_${zone1}_ex=$chain1
|
|
createchain $chain1 no
|
|
add_exclusions filter $chain1 $exclusions1
|
|
run_iptables -A $chain1 -j $chain
|
|
fi
|
|
#
|
|
# We must jump to the exclusion chain rather than to the policy chain
|
|
#
|
|
chain=$chain1
|
|
;;
|
|
*)
|
|
insert_exclusions filter $chain $exclusions1
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
if [ -n "$complex" ]; then
|
|
for host1 in $dest_hosts; do
|
|
interface1=${host1%%:*}
|
|
networks1=${host1#*:}
|
|
#
|
|
# Only generate an intrazone rule if the zone has more than one interface (port) or if
|
|
# routeback was specified for this host group
|
|
#
|
|
if [ $zone != $zone1 -o $num_ifaces -gt 1 ] || list_search $host1 $routeback ; then
|
|
run_iptables2 -A $frwd_chain -o $interface1 $(match_dest_hosts $networks1) $(match_ipsec_out $zone1 $host1) -j $chain
|
|
fi
|
|
done
|
|
else
|
|
for host in $source_hosts; do
|
|
interface=${host%%:*}
|
|
networks=${host#*:}
|
|
|
|
chain3=$(forward_chain $interface)
|
|
|
|
for host1 in $dest_hosts; do
|
|
interface1=${host1%%:*}
|
|
networks1=${host1#*:}
|
|
|
|
if [ "$host" != "$host1" ] || list_search $host $routeback; then
|
|
run_iptables2 -A $chain3 $(match_source_hosts $networks) -o $interface1 $(match_dest_hosts $networks1) $(match_ipsec_out $zone1 $host1) -j $chain
|
|
fi
|
|
done
|
|
done
|
|
fi
|
|
done
|
|
#
|
|
# E N D F O R W A R D I N G
|
|
#
|
|
# Now add (an) unconditional jump(s) to the last unique policy-only chain determined above, if any
|
|
#
|
|
if [ -n "$last_chain" ]; then
|
|
if [ -n "$complex" ]; then
|
|
run_iptables -A $frwd_chain -j $last_chain
|
|
else
|
|
for host in $source_hosts; do
|
|
interface=${host%%:*}
|
|
networks=${host#*:}
|
|
|
|
chain=$(forward_chain $interface)
|
|
|
|
run_iptables -A $chain $(match_source_hosts $networks) -j $last_chain
|
|
done
|
|
fi
|
|
fi
|
|
done
|
|
#
|
|
# Now add the jumps to the interface chains from FORWARD, INPUT, OUTPUT and POSTROUTING
|
|
#
|
|
for interface in $ALL_INTERFACES ; do
|
|
run_iptables -A FORWARD -i $interface -j $(forward_chain $interface)
|
|
run_iptables -A INPUT -i $interface -j $(input_chain $interface)
|
|
run_iptables -A OUTPUT -o $interface -j $(out_chain $interface)
|
|
addnatjump POSTROUTING $(masq_chain $interface) -o $interface
|
|
done
|
|
#
|
|
# Handle fw->fw
|
|
#
|
|
chain=${FW}2${FW}
|
|
|
|
if havechain $chain; then
|
|
#
|
|
# There is a fw->fw chain. Send loopback output through that chain
|
|
#
|
|
run_iptables -A OUTPUT -o lo -j $chain
|
|
#
|
|
# And delete the unconditional ACCEPT rule
|
|
#
|
|
run_iptables -D OUTPUT -o lo -j ACCEPT
|
|
fi
|
|
#
|
|
# Add policy enforcement to the builtin filter chains to catch underfined hosts
|
|
#
|
|
complete_standard_chain INPUT all $FW
|
|
complete_standard_chain OUTPUT $FW all
|
|
complete_standard_chain FORWARD all all
|
|
#
|
|
# Remove rules added to keep the firewall alive during [re]start"
|
|
#
|
|
disable_critical_hosts
|
|
|
|
for chain in INPUT OUTPUT FORWARD; do
|
|
[ -n "$FASTACCEPT" ] || run_iptables -D $chain -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
run_iptables -D $chain -p udp --dport 53 -j ACCEPT
|
|
done
|
|
|
|
process_routestopped -D
|
|
|
|
if [ -n "$LOGALLNEW" ]; then
|
|
for table in mangle nat filter; do
|
|
case $table in
|
|
mangle)
|
|
[ -n "$MANGLE_FORWARD" ] && chains="PREROUTING INPUT FORWARD POSTROUTING" || chains="PREROUTING INPUT"
|
|
;;
|
|
nat)
|
|
chains="PREROUTING POSTROUTING OUTPUT"
|
|
;;
|
|
*)
|
|
chains="INPUT FORWARD OUTPUT"
|
|
;;
|
|
esac
|
|
|
|
for chain in $chains; do
|
|
log_rule_limit $LOGALLNEW $chain $table $chain "" "" -I -m state --state NEW -t $table
|
|
done
|
|
done
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Compile a script that will stop the firewall
|
|
#
|
|
# This function is called by compile_firewall() so all of the overloaded functions
|
|
# from that script are available here
|
|
#
|
|
compile_stop_firewall() {
|
|
local IPTABLES_COMMAND="\$IPTABLES"
|
|
local INDENT=" "
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
#
|
|
# Stop/restore the firewall after an error or because of a "stop" or "clear" command
|
|
#
|
|
stop_firewall() {
|
|
|
|
deletechain() {
|
|
qt \$IPTABLES -L \$1 -n && qt \$IPTABLES -F \$1 && qt \$IPTABLES -X \$1
|
|
}
|
|
|
|
deleteallchains() {
|
|
\$IPTABLES -F
|
|
\$IPTABLES -X
|
|
}
|
|
|
|
setcontinue() {
|
|
\$IPTABLES -A \$1 -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
}
|
|
|
|
delete_nat() {
|
|
\$IPTABLES -t nat -F
|
|
\$IPTABLES -t nat -X
|
|
|
|
if [ -f \${VARDIR}/nat ]; then
|
|
while read external interface; do
|
|
del_ip_addr \$external \$interface
|
|
done < \${VARDIR}/nat
|
|
|
|
rm -f \${VARDIR}/nat
|
|
fi
|
|
}
|
|
|
|
case \$COMMAND in
|
|
stop|clear|restore)
|
|
;;
|
|
*)
|
|
set +x
|
|
|
|
case \$COMMAND in
|
|
start)
|
|
logger -p kern.err "ERROR:\$PRODUCT start failed"
|
|
;;
|
|
restart)
|
|
logger -p kern.err "ERROR:\$PRODUCT restart failed"
|
|
;;
|
|
restore)
|
|
logger -p kern.err "ERROR:\$PRODUCT restore failed"
|
|
;;
|
|
esac
|
|
|
|
if [ "\$RESTOREFILE" = NONE ]; then
|
|
COMMAND=clear
|
|
clear_firewall
|
|
echo "\$PRODUCT Cleared"
|
|
|
|
kill \$\$
|
|
exit 2
|
|
else
|
|
RESTOREPATH=\${VARDIR}/\$RESTOREFILE
|
|
|
|
if [ -x \$RESTOREPATH ]; then
|
|
|
|
if [ -x \${RESTOREPATH}-ipsets ]; then
|
|
progress_message2 Restoring Ipsets...
|
|
#
|
|
# We must purge iptables to be sure that there are no
|
|
# references to ipsets
|
|
#
|
|
for table in mangle nat filter; do
|
|
\$IPTABLES -t \$table -F
|
|
\$IPTABLES -t \$table -X
|
|
done
|
|
|
|
\${RESTOREPATH}-ipsets
|
|
fi
|
|
|
|
echo Restoring \${PRODUCT:=Shorewall}...
|
|
|
|
if \$RESTOREPATH restore; then
|
|
echo "\$PRODUCT restored from \$RESTOREPATH"
|
|
set_state "Started"
|
|
else
|
|
set_state "Unknown"
|
|
fi
|
|
|
|
kill \$\$
|
|
exit 2
|
|
fi
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
set_state "Stopping"
|
|
|
|
STOPPING="Yes"
|
|
|
|
TERMINATOR=
|
|
|
|
deletechain shorewall
|
|
|
|
determine_capabilities
|
|
|
|
__EOF__
|
|
|
|
append_file stop
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
if [ -n "\$MANGLE_ENABLED" ]; then
|
|
run_iptables -t mangle -F
|
|
run_iptables -t mangle -X
|
|
for chain in PREROUTING INPUT FORWARD POSTROUTING; do
|
|
qt \$IPTABLES -t mangle -P \$chain ACCEPT
|
|
done
|
|
fi
|
|
|
|
if [ -n "\$RAW_TABLE" ]; then
|
|
run_iptables -t raw -F
|
|
run_iptables -t raw -X
|
|
for chain in PREROUTING OUTPUT; do
|
|
qt \$IPTABLES -t raw -P \$chain ACCEPT
|
|
done
|
|
fi
|
|
|
|
if [ -n "\$NAT_ENABLED" ]; then
|
|
delete_nat
|
|
for chain in PREROUTING POSTROUTING OUTPUT; do
|
|
qt \$IPTABLES -t nat -P \$chain ACCEPT
|
|
done
|
|
fi
|
|
|
|
if [ -f \${VARDIR}/proxyarp ]; then
|
|
while read address interface external haveroute; do
|
|
qt arp -i \$external -d \$address pub
|
|
[ -z "\${haveroute}\${NOROUTES}" ] && qt ip route del \$address dev \$interface
|
|
done < \${VARDIR}/proxyarp
|
|
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f \$f/proxy_arp ] && echo 0 > \$f/proxy_arp
|
|
done
|
|
fi
|
|
|
|
rm -f \${VARDIR}/proxyarp
|
|
|
|
__EOF__
|
|
[ -n "$CLEAR_TC" ] && save_command "delete_tc1"
|
|
|
|
[ -n "$DISABLE_IPV6" ] && save_command "disable_ipv6"
|
|
|
|
save_command "undo_routing"
|
|
|
|
save_command "restore_default_route"
|
|
|
|
process_criticalhosts
|
|
|
|
if [ -n "$CRITICALHOSTS" ]; then
|
|
if [ -z "$ADMINISABSENTMINDED" ]; then
|
|
cat >&3 << __EOF__
|
|
|
|
for chain in INPUT OUTPUT; do
|
|
setpolicy \$chain ACCEPT
|
|
done
|
|
|
|
setpolicy FORWARD DROP
|
|
|
|
deleteallchains
|
|
|
|
__EOF__
|
|
|
|
for host in $CRITICALHOSTS; do
|
|
interface=${host%:*}
|
|
networks=${host#*:}
|
|
do_iptables -A INPUT -i $interface $(source_ip_range $networks) -j ACCEPT
|
|
do_iptables -A OUTPUT -o $interface $(dest_ip_range $networks) -j ACCEPT
|
|
done
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
for chain in INPUT OUTPUT; do
|
|
setpolicy \$chain DROP
|
|
done
|
|
|
|
__EOF__
|
|
else
|
|
cat >&3 << __EOF__
|
|
|
|
for chain in INPUT OUTPUT; do
|
|
setpolicy \$chain ACCEPT
|
|
done
|
|
|
|
setpolicy FORWARD DROP
|
|
|
|
deleteallchains
|
|
|
|
__EOF__
|
|
for host in $CRITICALHOSTS; do
|
|
interface=${host%:*}
|
|
networks=${host#*:}
|
|
do_iptables -A INPUT -i $interface $(source_ip_range $networks) -j ACCEPT
|
|
do_iptables -A OUTPUT -o $interface $(dest_ip_range $networks) -j ACCEPT
|
|
done
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
setpolicy INPUT DROP
|
|
|
|
for chain in INPUT FORWARD; do
|
|
setcontinue \$chain
|
|
done
|
|
|
|
__EOF__
|
|
fi
|
|
elif [ -z "$ADMINISABSENTMINDED" ]; then
|
|
cat >&3 << __EOF__
|
|
|
|
for chain in INPUT OUTPUT FORWARD; do
|
|
setpolicy \$chain DROP
|
|
done
|
|
|
|
deleteallchains
|
|
|
|
__EOF__
|
|
else
|
|
cat >&3 << __EOF__
|
|
|
|
for chain in INPUT FORWARD; do
|
|
setpolicy \$chain DROP
|
|
done
|
|
|
|
setpolicy OUTPUT ACCEPT
|
|
|
|
deleteallchains
|
|
|
|
for chain in INPUT FORWARD; do
|
|
setcontinue \$chain
|
|
done
|
|
|
|
__EOF__
|
|
fi
|
|
|
|
process_routestopped -A
|
|
|
|
save_command "\$IPTABLES -A INPUT -i lo -j ACCEPT"
|
|
|
|
[ -z "$ADMINISABSENTMINDED" ] && \
|
|
save_command "\$IPTABLES -A OUTPUT -o lo -j ACCEPT"
|
|
|
|
for interface in $(find_interfaces_by_option dhcp); do
|
|
save_command "\$IPTABLES -A INPUT -p udp -i $interface --dport 67:68 -j ACCEPT"
|
|
[ -z "$ADMINISABSENTMINDED" ] && \
|
|
save_command "\$IPTABLES -A OUTPUT -p udp -o $interface --dport 67:68 -j ACCEPT"
|
|
#
|
|
# This might be a bridge
|
|
#
|
|
save_command "\$IPTABLES -A FORWARD -p udp -i $interface -o $interface --dport 67:68 -j ACCEPT"
|
|
done
|
|
|
|
save_command
|
|
|
|
case "$IP_FORWARDING" in
|
|
On|on|ON)
|
|
save_command "echo 1 > /proc/sys/net/ipv4/ip_forward"
|
|
save_command "progress_message2 IP Forwarding Enabled"
|
|
;;
|
|
Off|off|OFF)
|
|
save_command "echo 0 > /proc/sys/net/ipv4/ip_forward"
|
|
save_command "progress_message2 IP Forwarding Disabled!"
|
|
;;
|
|
esac
|
|
|
|
append_file stopped
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
set_state "Stopped"
|
|
|
|
logger -p kern.info "\$PRODUCT Stopped"
|
|
|
|
case \$COMMAND in
|
|
stop|clear)
|
|
;;
|
|
*)
|
|
#
|
|
# The firewall is being stopped when we were trying to do something
|
|
# else. Remove the lock file and Kill the shell in case we're in a
|
|
# subshell
|
|
#
|
|
kill \$\$
|
|
;;
|
|
esac
|
|
}
|
|
__EOF__
|
|
}
|
|
|
|
#
|
|
# Conditionally add an option to .conf file (FD 3)
|
|
#
|
|
conditionally_add_option() { # $1 = option name
|
|
local value
|
|
|
|
eval value=\"\$$1\"
|
|
|
|
if [ -n "$value" ]; then
|
|
cat >&3 << __EOF__
|
|
[ -n "\${$1:=$value}" ]
|
|
__EOF__
|
|
fi
|
|
}
|
|
|
|
conditionally_add_option1() { # $1 = option name
|
|
local value
|
|
|
|
eval value=\"\$$1\"
|
|
|
|
if [ -n "$value" ]; then
|
|
cat >&3 << __EOF__
|
|
$1="$value"
|
|
__EOF__
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Post-process generated script to:
|
|
#
|
|
# - Suppress redundant blank lines
|
|
# - Replace leading spaces with tabs
|
|
#
|
|
mycat()
|
|
{
|
|
if [ -n "$HAVEAWK" ]; then
|
|
awk 'BEGIN {blnk=0;}; /^[[:space:]]*$/ {blnk=1; next; }; { while (/^\t* /) sub(/ /, "\t" ); if (blnk == 1 ) { print ""; blnk=0; }; print; }' $*
|
|
else
|
|
cat $*
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Compile a Firewall Script
|
|
#
|
|
compile_firewall() # $1 = File Name
|
|
{
|
|
local IPTABLES_COMMAND=run_iptables
|
|
local INDENT=""
|
|
local checking= outfile=$1 dir=
|
|
|
|
setup_mss()
|
|
{
|
|
case $CLAMPMSS in
|
|
Yes)
|
|
option="--clamp-mss-to-pmtu"
|
|
;;
|
|
*)
|
|
option="--set-mss $CLAMPMSS"
|
|
;;
|
|
esac
|
|
|
|
run_iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS $option
|
|
}
|
|
|
|
progress_message2 "Initializing..."
|
|
|
|
#
|
|
# So that mktempdir doesn't have to jump through hoops when there isn't a working 'mktemp',
|
|
# we create the compiler's temporary directory in TMP_DIR
|
|
#
|
|
STATEDIR=$TMP_DIR/compiler_state/
|
|
|
|
mkdir $STATEDIR || fatal_error "Cannot create temporary directory in $TMP_DIR"
|
|
|
|
if [ $COMMAND = compile ]; then
|
|
dir=$(dirname $1)
|
|
[ -d $dir ] || fatal_error "Directory $dir does not exist"
|
|
[ -h $dir ] && fatal_error "$dir is a Symbolic Link"
|
|
[ -d $outfile ] && fatal_error "$outfile is a Directory"
|
|
[ -h $outfile ] && fatal_error "$outfile is a Symbolic Link"
|
|
[ -f $outfile -a ! -x $outfile ] && fatal_error "$outfile exists and is not a restore file"
|
|
|
|
DOING=Compiling
|
|
DONE=compiled
|
|
|
|
OUTPUT=$(mktempfile $STATEDIR)
|
|
|
|
[ -n "$OUTPUT" ] || fatal_error "Cannot create temporary file in /tmp"
|
|
|
|
exec 3>>$OUTPUT
|
|
else
|
|
DOING=Checking
|
|
DONE=checked
|
|
checking=Yes
|
|
COMMAND=compile
|
|
|
|
exec 3>/dev/null
|
|
fi
|
|
|
|
cat >&3 << __EOF__
|
|
#
|
|
# Compiled firewall script generated by Shorewall $VERSION - $(date)"
|
|
#
|
|
__EOF__
|
|
|
|
if [ -n "$EXPORT" ]; then
|
|
cat >&3 << __EOF__
|
|
SHAREDIR=/usr/share/shorewall-lite
|
|
CONFDIR=/etc/shorewall-lite
|
|
VARDIR=/var/lib/shorewall-lite
|
|
|
|
__EOF__
|
|
|
|
cat ${SHAREDIR}/lib.base >&3
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
################################################################################
|
|
# End of ${SHAREDIR}/lib.base
|
|
################################################################################
|
|
|
|
__EOF__
|
|
else
|
|
cat >&3 << __EOF__
|
|
SHAREDIR=/usr/share/shorewall
|
|
CONFDIR=/etc/shorewall
|
|
VARDIR=/var/lib/shorewall
|
|
|
|
. \${SHAREDIR}/lib.base
|
|
__EOF__
|
|
fi
|
|
|
|
cat >&3 << __EOF__
|
|
#
|
|
# Set policy of chain \$1 to \$2
|
|
#
|
|
setpolicy() {
|
|
\$IPTABLES -P \$1 \$2
|
|
}
|
|
__EOF__
|
|
|
|
compile_stop_firewall
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
#
|
|
# Remove all Shorewall-added rules
|
|
#
|
|
clear_firewall() {
|
|
stop_firewall
|
|
|
|
setpolicy INPUT ACCEPT
|
|
setpolicy FORWARD ACCEPT
|
|
setpolicy OUTPUT ACCEPT
|
|
|
|
run_iptables -F
|
|
|
|
echo 1 > /proc/sys/net/ipv4/ip_forward
|
|
|
|
__EOF__
|
|
if [ -n "$DISABLE_IPV6" ]; then
|
|
cat >&3 << __EOF__
|
|
if qt mywhich ip6tables; then
|
|
ip6tables -P INPUT ACCEPT 2> /dev/null
|
|
ip6tables -P OUTPUT ACCEPT 2> /dev/null
|
|
ip6tables -P FORWARD ACCEPT 2> /dev/null
|
|
fi
|
|
|
|
__EOF__
|
|
fi
|
|
|
|
append_file clear
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
set_state "Cleared"
|
|
|
|
logger -p kern.info "\$PRODUCT Cleared"
|
|
}
|
|
|
|
#
|
|
# Issue a message and stop/restore the firewall
|
|
#
|
|
fatal_error()
|
|
{
|
|
echo " ERROR: \$@" >&2
|
|
stop_firewall
|
|
exit 2
|
|
}
|
|
|
|
#
|
|
# Issue a message and stop
|
|
#
|
|
startup_error() # \$* = Error Message
|
|
{
|
|
echo " ERROR: \$@" >&2
|
|
case \$COMMAND in
|
|
start)
|
|
logger -p kern.err "ERROR:\$PRODUCT start failed"
|
|
;;
|
|
restart)
|
|
logger -p kern.err "ERROR:\$PRODUCT restart failed"
|
|
;;
|
|
restore)
|
|
logger -p kern.err "ERROR:\$PRODUCT restore failed"
|
|
;;
|
|
esac
|
|
|
|
kill \$\$
|
|
exit 2
|
|
}
|
|
|
|
#
|
|
# Run iptables and if an error occurs, stop/restore the firewall
|
|
#
|
|
run_iptables()
|
|
{
|
|
if [ -n "\$COMMENT" ]; then
|
|
\$IPTABLES \$@ -m comment --comment "\$COMMENT"
|
|
else
|
|
\$IPTABLES \$@
|
|
fi
|
|
|
|
if [ \$? -ne 0 ]; then
|
|
error_message "ERROR: Command \"\$IPTABLES \$@\" Failed"
|
|
stop_firewall
|
|
exit 2
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Run iptables and if an error occurs, stop/restore the firewall
|
|
#
|
|
run_ip()
|
|
{
|
|
if ! ip \$@; then
|
|
error_message "ERROR: Command \"ip \$@\" Failed"
|
|
stop_firewall
|
|
exit 2
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Run tc and if an error occurs, stop/restore the firewall
|
|
#
|
|
run_tc() {
|
|
if ! tc \$@ ; then
|
|
error_message "ERROR: Command \"tc \$@\" Failed"
|
|
stop_firewall
|
|
exit 2
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Functions to appease unconverted extension scripts
|
|
#
|
|
save_command()
|
|
{
|
|
return 0
|
|
}
|
|
|
|
run_and_save_command() {
|
|
eval \$@
|
|
}
|
|
|
|
ensure_and_save_command() {
|
|
eval \$@ || fatal_error "Command \"\$@\" failed"
|
|
}
|
|
|
|
#
|
|
# Initialize environment
|
|
#
|
|
initialize() {
|
|
__EOF__
|
|
INDENT=" "
|
|
|
|
if [ -n "$EXPORT" ]; then
|
|
cat >&3 << __EOF__
|
|
#
|
|
# These variables are required by the library functions called in this script
|
|
#
|
|
CONFIG_PATH="/etc/shorewall-lite:/usr/share/shorewall-lite"
|
|
__EOF__
|
|
else
|
|
cat >&3 << __EOF__
|
|
if [ ! -f \${SHAREDIR}/version ]; then
|
|
fatal_error "This script requires Shorewall which do not appear to be installed on this system (did you forget "-e" when you compiled?)"
|
|
fi
|
|
|
|
local version=\$(cat \${SHAREDIR}/version)
|
|
|
|
if [ \${SHOREWALL_LIBVERSION:-0} -lt 30203 ]; then
|
|
fatal_error "This script requires Shorewall version 3.3.3 or later; current version is \$version"
|
|
fi
|
|
#
|
|
# These variables are required by the library functions called in this script
|
|
#
|
|
CONFIG_PATH="$CONFIG_PATH"
|
|
__EOF__
|
|
fi
|
|
|
|
cat >&3 << __EOF__
|
|
[ -n "\${COMMAND:=restart}" ]
|
|
[ -n "\${VERBOSE:=0}" ]
|
|
[ -n "\${RESTOREFILE:=$RESTOREFILE}" ]
|
|
MODULESDIR="$MODULESDIR"
|
|
MODULE_SUFFIX="$MODULE_SUFFIX"
|
|
LOGLIMIT="$LOGLIMIT"
|
|
LOGTAGONLY="$LOGTAGONLY"
|
|
LOGRULENUMBERS="$LOGRULENUMBERS"
|
|
__EOF__
|
|
|
|
if [ -n "$LOGFORMAT" ]; then
|
|
cat >&3 << __EOF__
|
|
LOGFORMAT="$LOGFORMAT"
|
|
__EOF__
|
|
else
|
|
cat >&3 << __EOF__
|
|
[ -n "\$LOGFORMAT\" ] || LOGFORMAT="Shorewall:%s:%s:"
|
|
__EOF__
|
|
fi
|
|
|
|
cat >&3 << __EOF__
|
|
VERSION="$VERSION"
|
|
SUBSYSLOCK="$SUBSYSLOCK"
|
|
PATH="$PATH"
|
|
TERMINATOR=fatal_error
|
|
|
|
__EOF__
|
|
if [ -n "$IPTABLES" ]; then
|
|
cat >&3 << __EOF__
|
|
IPTABLES="$IPTABLES"
|
|
|
|
[ -x "$IPTABLES" ] || startup_error "IPTABLES=$IPTABLES does not exist or is not executable"
|
|
__EOF__
|
|
else
|
|
cat >&3 << __EOF__
|
|
[ -z "\$IPTABLES" ] && IPTABLES=\$(mywhich iptables 2> /dev/null)
|
|
|
|
[ -n "\$IPTABLES" -a -x "\$IPTABLES" ] || startup_error "Can't find iptables executable"
|
|
__EOF__
|
|
fi
|
|
|
|
[ -n "$EXPORTPARAMS" ] && append_file params
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
STOPPING=
|
|
COMMENT=
|
|
|
|
#
|
|
# The library requires that ${VARDIR} exist
|
|
#
|
|
[ -d \${VARDIR} ] || mkdir -p \${VARDIR}
|
|
|
|
}
|
|
__EOF__
|
|
|
|
report_capabilities
|
|
|
|
if [ -n "$BRIDGING" ]; then
|
|
[ -n "$PHYSDEV_MATCH" ] || fatal_error "BRIDGING=Yes requires Physdev Match support in your Kernel and iptables"
|
|
fi
|
|
|
|
[ "$MACLIST_TTL" = "0" ] && MACLIST_TTL=
|
|
|
|
if [ -n "$MACLIST_TTL" -a -z "$RECENT_MATCH" ]; then
|
|
fatal_error "MACLIST_TTL requires the Recent Match capability which is not present in your Kernel and/or iptables"
|
|
fi
|
|
|
|
[ -n "$RFC1918_STRICT" -a -z "$CONNTRACK_MATCH" ] && \
|
|
fatal_error "RFC1918_STRICT=Yes requires Connection Tracking match"
|
|
|
|
progress_message2 "Determining Zones..."
|
|
|
|
determine_zones
|
|
|
|
if [ $VERBOSE -ge 1 ]; then
|
|
display_list "IPv4 Zones:" $IPV4_ZONES
|
|
[ -n "$IPSEC_ZONES" ] && \
|
|
display_list "IPSEC Zones:" $IPSEC_ZONES
|
|
display_list "Firewall Zone:" $FW
|
|
fi
|
|
|
|
progress_message2 "Validating interfaces file..."
|
|
|
|
validate_interfaces_file
|
|
|
|
progress_message2 "Validating hosts file..."
|
|
|
|
validate_hosts_file
|
|
|
|
define_builtin_actions
|
|
|
|
if [ -n "$USE_ACTIONS" ]; then
|
|
progress_message2 "Pre-processing Actions..."
|
|
process_actions1
|
|
fi
|
|
|
|
progress_message2 "Validating Policy file..."
|
|
|
|
validate_policy
|
|
|
|
progress_message2 "Determining Hosts in Zones..."
|
|
|
|
determine_interfaces
|
|
determine_hosts
|
|
|
|
if [ -s $TMP_DIR/tcrules ]; then
|
|
progress_message2 "Compiling $(find_file tcrules)..."
|
|
process_tc_rules
|
|
fi
|
|
|
|
if [ "$TC_ENABLED" = Internal ]; then
|
|
[ -n "$LIB_tc_LOADED" ] && setup_traffic_shaping
|
|
fi
|
|
|
|
if [ -n "$(find_hosts_by_option blacklist)" ]; then
|
|
process_blacklist
|
|
fi
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
#
|
|
# Start/Restart/Reload the firewall
|
|
#
|
|
define_firewall() {
|
|
local restore_file=\$1
|
|
__EOF__
|
|
|
|
INDENT=" "
|
|
|
|
save_progress_message "Initializing..."
|
|
|
|
if [ -n "$EXPORT" ]; then
|
|
f=$(find_file modules)
|
|
|
|
if [ "$f" != ${SHAREDIR}/modules -a -f $f ]; then
|
|
save_command 'echo MODULESDIR="$MODULESDIR" > ${VARDIR}/.modulesdir'
|
|
save_command "cat > \${VARDIR}/.modules $LEFTSHIFT EOF"
|
|
grep loadmodule $f | sed 's/^\s*//' >&3
|
|
save_command_unindented EOF
|
|
save_command "reload_kernel_modules < \${VARDIR}/.modules"
|
|
else
|
|
save_command load_kernel_modules Yes
|
|
fi
|
|
else
|
|
save_command load_kernel_modules Yes
|
|
fi
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
if interface_has_option $interface norfc1918; then
|
|
indent >&3 << __EOF__
|
|
addr=\$(ip -f inet addr show $interface 2> /dev/null | grep 'inet\ ' | head -n1)
|
|
if [ -n "\$addr" ]; then
|
|
addr=\$(echo \$addr | sed 's/inet //;s/\/.*//;s/ peer.*//')
|
|
for network in 10.0.0.0/8 176.16.0.0/12 192.168.0.0/16; do
|
|
if in_network \$addr \$network; then
|
|
startup_error "The 'norfc1918' option has been specified on an interface with an RFC 1918 address. Interface:$interface"
|
|
fi
|
|
done
|
|
fi
|
|
|
|
__EOF__
|
|
fi
|
|
done
|
|
|
|
append_file init
|
|
|
|
TERMINATOR=fatal_error
|
|
|
|
deletechain shorewall
|
|
|
|
if [ -n "$NAT_ENABLED" ]; then
|
|
delete_nat
|
|
for chain in PREROUTING POSTROUTING OUTPUT; do
|
|
qt_iptables -t nat -P $chain ACCEPT
|
|
done
|
|
fi
|
|
|
|
delete_proxy_arp
|
|
|
|
if [ -n "$MANGLE_ENABLED" ]; then
|
|
run_iptables -t mangle -F
|
|
run_iptables -t mangle -X
|
|
for chain in PREROUTING INPUT FORWARD POSTROUTING; do
|
|
qt_iptables -t mangle -P $chain ACCEPT
|
|
done
|
|
fi
|
|
|
|
if [ -n "$RAW_TABLE" ]; then
|
|
run_iptables -t raw -F
|
|
run_iptables -t raw -X
|
|
for chain in PREROUTING OUTPUT; do
|
|
qt_iptables -t raw -P $chain ACCEPT
|
|
done
|
|
fi
|
|
|
|
[ -n "$CLEAR_TC" ] && delete_tc
|
|
|
|
progress_message2 "Deleting user chains..."
|
|
|
|
save_progress_message "Deleting user chains..."
|
|
|
|
exists_INPUT=Yes
|
|
exists_OUTPUT=Yes
|
|
exists_FORWARD=Yes
|
|
|
|
process_criticalhosts
|
|
|
|
if [ -n "$CRITICALHOSTS" ]; then
|
|
|
|
setpolicy INPUT ACCEPT
|
|
setpolicy OUTPUT ACCEPT
|
|
setpolicy FORWARD DROP
|
|
|
|
deleteallchains
|
|
|
|
enable_critical_hosts
|
|
|
|
setpolicy INPUT DROP
|
|
setpolicy OUTPUT DROP
|
|
|
|
[ -n "$CLAMPMSS" ] && setup_mss
|
|
|
|
setcontinue FORWARD
|
|
setcontinue INPUT
|
|
setcontinue OUTPUT
|
|
else
|
|
|
|
setpolicy INPUT DROP
|
|
setpolicy OUTPUT DROP
|
|
setpolicy FORWARD DROP
|
|
|
|
deleteallchains
|
|
|
|
[ -n "$CLAMPMSS" ] && setup_mss
|
|
|
|
setcontinue FORWARD
|
|
setcontinue INPUT
|
|
setcontinue OUTPUT
|
|
fi
|
|
|
|
indent >&3 << __EOF__
|
|
|
|
f=\$(find_file ipsets)
|
|
|
|
if [ -f \$f ]; then
|
|
progress_message2 "Restoring IPSETS..."
|
|
ipset -U :all: :all:
|
|
ipset -F
|
|
ipset -X
|
|
ipset -R < \$f
|
|
fi
|
|
|
|
__EOF__
|
|
|
|
append_file continue
|
|
|
|
f=$(find_file routestopped)
|
|
|
|
progress_message2 "$DOING $f ..."
|
|
|
|
process_routestopped -A
|
|
|
|
if [ -n "$DISABLE_IPV6" ]; then
|
|
save_command disable_ipv6
|
|
fi
|
|
|
|
save_progress_message "Enabling Loopback and DNS Lookups"
|
|
|
|
#
|
|
# Enable the Loopback interface for now
|
|
#
|
|
run_iptables -A INPUT -i lo -j ACCEPT
|
|
run_iptables -A OUTPUT -o lo -j ACCEPT
|
|
|
|
#
|
|
# Allow DNS lookups during startup for FQDNs
|
|
#
|
|
|
|
for chain in INPUT OUTPUT FORWARD; do
|
|
run_iptables -A $chain -p udp --dport 53 -j ACCEPT
|
|
done
|
|
|
|
[ -n "$LIB_accounting_LOADED" ] && setup_accounting $(find_file accounting)
|
|
|
|
createchain reject no
|
|
createchain dynamic no
|
|
createchain logdrop no
|
|
createchain logreject no
|
|
createchain smurfs no
|
|
|
|
log_rule ${BLACKLIST_LOGLEVEL:-info} logdrop DROP
|
|
log_rule ${BLACKLIST_LOGLEVEL:-info} logreject REJECT
|
|
|
|
run_iptables -A logdrop -j DROP
|
|
run_iptables -A logreject -j reject
|
|
|
|
indent >&3 << __EOF__
|
|
|
|
if [ -f \${VARDIR}/save ]; then
|
|
progress_message2 "Setting up dynamic rules..."
|
|
rangematch='source IP range'
|
|
while read target ignore1 ignore2 address ignore3 rest; do
|
|
case \$target in
|
|
DROP|reject|logdrop|logreject)
|
|
case \$rest in
|
|
\$rangematch*)
|
|
run_iptables -A dynamic -m iprange --src-range \${rest#source IP range} -j \$target
|
|
;;
|
|
*)
|
|
if [ -z "\$rest" ]; then
|
|
run_iptables -A dynamic -s \$address -j \$target
|
|
else
|
|
error_message "WARNING: Unable to restore dynamic rule \"\$target \$ignore1 \$ignore2 \$address \$ignore3 \$rest\""
|
|
fi
|
|
;;
|
|
esac
|
|
;;
|
|
esac
|
|
done < \${VARDIR}/save
|
|
fi
|
|
__EOF__
|
|
|
|
[ -n "$BLACKLISTNEWONLY" ] && state="-m state --state NEW,INVALID" || state=
|
|
|
|
progress_message2 "Creating Interface Chains..."
|
|
|
|
save_progress_message "Creating Interface Chains..."
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
for chain in $(input_chain $interface) $(forward_chain $interface); do
|
|
createchain $chain no
|
|
run_iptables -A $chain $state -j dynamic
|
|
done
|
|
|
|
createchain $(out_chain $interface) no
|
|
done
|
|
|
|
if [ -s $TMP_DIR/proxyarp ]; then
|
|
progress_message2 "$DOING Proxy ARP"
|
|
setup_proxy_arp
|
|
else
|
|
> $STATEDIR/proxyarp
|
|
fi
|
|
|
|
#
|
|
# [re]-Establish routing
|
|
#
|
|
if [ -s $TMP_DIR/providers ]; then
|
|
setup_providers $(find_file providers)
|
|
[ -n "$ROUTEMARK_INTERFACES" ] && setup_route_marking
|
|
else
|
|
save_command
|
|
save_command undo_routing
|
|
save_command restore_default_route
|
|
fi
|
|
|
|
|
|
if [ -s $TMP_DIR/nat ]; then
|
|
progress_message2 "$DOING NAT..."
|
|
setup_nat
|
|
else
|
|
> $STATEDIR/nat
|
|
fi
|
|
|
|
if [ -s $TMP_DIR/netmap ]; then
|
|
progress_message2 "$DOING NETMAP..."
|
|
setup_netmap
|
|
fi
|
|
|
|
progress_message2 "$DOING Common Rules"
|
|
add_common_rules
|
|
|
|
save_progress_message "Setting up SYN Flood Protection..."
|
|
|
|
setup_syn_flood_chains
|
|
|
|
setup_ipsec
|
|
|
|
maclist_hosts=$(find_hosts_by_option maclist)
|
|
|
|
if [ -n "$maclist_hosts" ]; then
|
|
save_progress_message "Setting up MAC Filtration -- Phase 1..."
|
|
setup_mac_lists 1
|
|
fi
|
|
|
|
progress_message2 "$DOING $(find_file rules)..."
|
|
save_progress_message "Setting up Rules..."
|
|
process_rules
|
|
|
|
if [ -s $TMP_DIR/tunnels ]; then
|
|
tunnels=$(find_file tunnels)
|
|
progress_message2 "$DOING $tunnels..."
|
|
save_progress_message "Setting up Tunnels..."
|
|
setup_tunnels $tunnels
|
|
fi
|
|
|
|
if [ -n "$DEFAULT_MACROS" ]; then
|
|
progress_message2 "$DOING default macros..."
|
|
save_progress_message "Creating default macro chains..."
|
|
for macro in $DEFAULT_MACROS; do
|
|
process_default_macro $macro
|
|
done
|
|
fi
|
|
|
|
if [ -n "$USEDACTIONS" ]; then
|
|
save_progress_message "Setting up Actions..."
|
|
|
|
progress_message2 "$DOING Actions...";
|
|
[ -n "$USE_ACTIONS" ] && process_actions2
|
|
process_actions3
|
|
fi
|
|
|
|
if [ -n "$maclist_hosts" ]; then
|
|
save_progress_message "Setting up MAC Filtration -- Phase 2..."
|
|
setup_mac_lists 2
|
|
fi
|
|
|
|
save_progress_message "Applying Policies..."
|
|
|
|
progress_message2 "$DOING $(find_file policy)..."; apply_policy_rules
|
|
|
|
if [ -s $TMP_DIR/masq ]; then
|
|
setup_masq $(find_file masq)
|
|
fi
|
|
|
|
if [ -n "$MANGLE_ENABLED" ]; then
|
|
tos=$(find_file tos)
|
|
[ -f $tos ] && process_tos $tos
|
|
|
|
ecn=$(find_file ecn)
|
|
[ -f $ecn ] && setup_ecn $ecn
|
|
|
|
setup_tc
|
|
fi
|
|
|
|
progress_message2 "$DOING Rule Activation..."
|
|
save_progress_message "Activating Rules..."
|
|
activate_rules
|
|
|
|
if [ -n "$ALIASES_TO_ADD" ]; then
|
|
save_command add_ip_aliases $ALIASES_TO_ADD
|
|
fi
|
|
|
|
for file in chains nat proxyarp zones; do
|
|
save_command "cat > \${VARDIR}/$file $LEFTSHIFT __EOF__"
|
|
cat $STATEDIR/$file >&3
|
|
save_command_unindented __EOF__
|
|
done
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
if [ \$COMMAND = restore ]; then
|
|
iptables-restore < \$restore_file
|
|
fi
|
|
|
|
__EOF__
|
|
save_command "date > \${VARDIR}/restarted"
|
|
|
|
append_file start
|
|
|
|
if [ -n "$DELAYBLACKLISTLOAD" -a -s ${TMP_DIR}/blacklist ]; then
|
|
save_command
|
|
save_command progress_message2 \"Loading Black List...\"
|
|
save_command load_blacklist
|
|
save_command
|
|
fi
|
|
|
|
createchain shorewall no
|
|
|
|
save_command set_state "Started"
|
|
|
|
append_file started
|
|
|
|
cat >&3 << __EOF__
|
|
|
|
cp -f \$(my_pathname) \${VARDIR}/.restore
|
|
|
|
case \$COMMAND in
|
|
start)
|
|
logger -p kern.info "\$PRODUCT started"
|
|
;;
|
|
restart)
|
|
logger -p kern.info "\$PRODUCT restarted"
|
|
;;
|
|
restore)
|
|
logger -p kern.info "\$PRODUCT restored"
|
|
;;
|
|
esac
|
|
|
|
}
|
|
|
|
#
|
|
# Silently define Firewall and ignore errors
|
|
#
|
|
restore_firewall()
|
|
{
|
|
iptables_save_file=\${VARDIR}/\$(basename \$0)-iptables
|
|
|
|
fatal_error()
|
|
{
|
|
echo " ERROR: \$@" >&2
|
|
}
|
|
|
|
startup_error() # \$@ = Error Message
|
|
{
|
|
echo " ERROR: \$@" >&2
|
|
}
|
|
|
|
run_iptables() { return 0; }
|
|
|
|
VERBOSE=-1 # The progress messages don't make sense without iptables
|
|
|
|
IPTABLES=run_iptables
|
|
|
|
if [ -f \$iptables_save_file ]; then
|
|
{
|
|
define_firewall \$iptables_save_file
|
|
}
|
|
else
|
|
fatal_error "\$iptables_save_file does not exist"
|
|
exit 2
|
|
fi
|
|
}
|
|
|
|
__EOF__
|
|
|
|
compile_refresh_firewall
|
|
|
|
exec 3>&-
|
|
|
|
if [ -n "$checking" ]; then
|
|
progress_message3 "Shorewall configuration verified"
|
|
else
|
|
INDENT=
|
|
mycat $(find_file prog.header) $OUTPUT $(find_file prog.footer) > $outfile
|
|
chmod 700 $outfile
|
|
if [ -n "$EXPORT" ]; then
|
|
exec 3>${outfile}.conf
|
|
cat >&3 << __EOF__
|
|
#
|
|
# Shorewall auxiliary configuration file created by Shorewall version $VERSION - $(date)
|
|
#
|
|
__EOF__
|
|
for option in VERBOSITY LOGFILE LOGFORMAT IPTABLES PATH SHOREWALL_SHELL SUBSYSLOCK RESTOREFILE SAVE_IPSETS; do
|
|
conditionally_add_option $option
|
|
done
|
|
|
|
conditionally_add_option1 TC_ENABLED
|
|
|
|
exec 3>&-
|
|
fi
|
|
|
|
progress_message3 "Shorewall configuration compiled to $(resolve_file $outfile)"
|
|
rm -f $OUTPUT
|
|
fi
|
|
|
|
rm -rf $TMP_DIR
|
|
|
|
}
|
|
|
|
#
|
|
# Give Usage Information
|
|
#
|
|
usage() {
|
|
echo "Usage: $0 [debug] check|compile <filename>}"
|
|
exit 1
|
|
}
|
|
|
|
#
|
|
# E X E C U T I O N B E G I N S H E R E
|
|
#
|
|
#
|
|
# Start trace if first arg is "debug"
|
|
#
|
|
debug='-w'
|
|
|
|
[ $# -gt 1 ] && [ "$1" = "debug" ] && { set -x ; shift ; }
|
|
|
|
if [ "$PROFILE" ]; then
|
|
debug='-wd:DProf'
|
|
elif [ "$DEBUG" ]; then
|
|
debug='-wd'
|
|
fi
|
|
|
|
NOLOCK=
|
|
|
|
[ $# -gt 1 ] && [ "$1" = "nolock" ] && { NOLOCK=Yes; shift ; }
|
|
|
|
trap "exit 2" 1 2 3 4 5 6 9
|
|
|
|
SHAREDIR=/usr/share/shorewall
|
|
VARDIR=/var/lib/shorewall
|
|
[ -z "$EXPORT" ] && CONFDIR=/etc/shorewall || CONFDIR=${SHAREDIR}/configfiles
|
|
|
|
[ -n "${VERBOSE:=2}" ]
|
|
|
|
for library in lib.base lib.config; do
|
|
FUNCTIONS=${SHAREDIR}/${library}
|
|
|
|
if [ -f $FUNCTIONS ]; then
|
|
[ $VERBOSE -ge 2 ] && echo "Loading $FUNCTIONS..."
|
|
. $FUNCTIONS
|
|
else
|
|
fatal_error "Installation Error: $FUNCTIONS does not exist!"
|
|
fi
|
|
done
|
|
|
|
PROGRAM=compiler
|
|
|
|
COMMAND="$1"
|
|
|
|
case "$COMMAND" in
|
|
|
|
check)
|
|
[ $# -ne 1 ] && usage
|
|
do_initialize
|
|
[ "$SHOREWALL_COMPILER" = perl ] && exec perl $debug /usr/share/shorewall-perl/compiler.pl || compile_firewall
|
|
;;
|
|
|
|
compile)
|
|
[ $# -ne 2 ] && usage
|
|
do_initialize
|
|
[ "$SHOREWALL_COMPILER" = perl ] && exec perl $debug /usr/share/shorewall-perl/compiler.pl $2 || compile_firewall $2
|
|
;;
|
|
|
|
call)
|
|
#
|
|
# Undocumented way to call functions in ${SHAREDIR}/compiler directly
|
|
#
|
|
shift
|
|
do_initialize
|
|
EMPTY=
|
|
$@
|
|
;;
|
|
|
|
*)
|
|
usage
|
|
;;
|
|
|
|
esac
|