mirror of
https://gitlab.com/shorewall/code.git
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db6e832174
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@3890 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
2718 lines
61 KiB
Bash
Executable File
2718 lines
61 KiB
Bash
Executable File
#!/bin/sh
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#
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# The Shoreline Firewall (Shorewall) Packet Filtering Firewall - V3.2
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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 - Tom Eastep (teastep@shorewall.net)
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#
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# tcstart from tc4shorewall Version 0.5
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# (c) 2005 Arne Bernin <arne@ucbering.de>
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# Modified by Tom Eastep for integration into the Shorewall distribution
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# published under GPL Version 2#
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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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# shorewall start Starts the firewall
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# shorewall restart Restarts the firewall
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# shorewall stop Stops the firewall
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# shorewall reset Resets iptables packet and
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# byte counts
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# shorewall clear Remove all Shorewall chains
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# and rules/policies.
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# shorewall refresh . Rebuild the common chain
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#
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# Mutual exclusion -- These functions are jackets for the mutual exclusion
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# routines in $FUNCTIONS. They invoke
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# the corresponding function in that file if the user did
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# not specify "nolock" on the runline.
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#
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my_mutex_on() {
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[ -n "$NOLOCK" ] || { mutex_on; HAVE_MUTEX=Yes; }
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}
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my_mutex_off() {
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[ -n "$HAVE_MUTEX" ] && { mutex_off; HAVE_MUTEX=; }
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}
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#
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# Fatal error -- stops the firewall 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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stop_firewall
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exit 2
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}
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#
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# Fatal error during startup -- generate an error message and abend without
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# altering the state of the firewall
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#
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startup_error() # $* = Error Message
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{
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echo " ERROR: $@" >&2
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my_mutex_off
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[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
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[ -n "$RESTOREBASE" ] && rm -f $RESTOREBASE
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kill $$
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exit 2
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}
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#
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# Send a message to STDOUT and the System Log
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#
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report () { # $* = message
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progress_message3 "$@"
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logger "$@"
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}
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#
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# Run iptables and if an error occurs, stop the firewall and quit
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#
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run_iptables() {
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if [ -z "$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 "$BRIDGING" ] && [ -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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if ! $IPTABLES $@ ; then
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if [ -z "$STOPPING" ]; then
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error_message "ERROR: Command \"$IPTABLES $@\" Failed"
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stop_firewall
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exit 2
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fi
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fi
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}
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#
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# Version of 'run_iptables' that inserts white space after "!" in the arg list
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#
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run_iptables2() {
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case "$@" in
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*!*)
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run_iptables $(fix_bang $@)
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;;
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*)
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run_iptables $@
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;;
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esac
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}
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#
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# Quietly run iptables
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#
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qt_iptables() {
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if [ -z "$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 "$BRIDGING" ] && [ -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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qt $IPTABLES $@
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}
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#
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# Run ip and if an error occurs, stop the firewall and quit
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#
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run_ip() {
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if ! ip $@ ; then
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if [ -z "$STOPPING" ]; then
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error_message "ERROR: Command \"ip $@\" Failed"
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stop_firewall
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exit 2
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fi
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fi
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}
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#
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# Run tc and if an error occurs, stop the firewall and quit
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#
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run_tc() {
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if ! tc $@ ; then
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if [ -z "$STOPPING" ]; then
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error_message "ERROR: Command \"tc $@\" Failed"
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stop_firewall
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exit 2
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fi
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fi
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}
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#
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# 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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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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# Determine if a chain is a policy chain
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#
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is_policy_chain() # $1 = name of chain
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{
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eval test \"\$${1}_is_policy\" = Yes
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}
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#
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# Set a standard chain's policy
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#
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setpolicy() # $1 = name of chain, $2 = policy
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{
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run_iptables -P $1 $2
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}
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#
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# Set a standard chain to enable established and related connections
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#
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setcontinue() # $1 = name of chain
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{
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run_iptables -A $1 -m state --state ESTABLISHED,RELATED -j ACCEPT
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}
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#
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# Flush one of the NAT table chains
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#
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flushnat() # $1 = name of chain
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{
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run_iptables -t nat -F $1
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}
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#
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# Flush one of the Mangle table chains
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#
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flushmangle() # $1 = name of chain
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{
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run_iptables -t mangle -F $1
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}
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#
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# This function assumes that the TMP_DIR variable is set and that
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# its value named an existing directory.
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#
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determine_zones()
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{
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local zone parent parents rest new_zone_file= r
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merge_zone()
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{
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local z zones="$ZONES" merged=
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if [ -n "$parents" ]; then
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ZONES=
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for z in $zones; do
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if [ -z "$merged" ] && list_search $z $parents; then
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ZONES="$ZONES $zone"
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merged=Yes
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fi
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ZONES="$ZONES $z"
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done
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else
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ZONES="$ZONES $zone"
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fi
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}
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strip_file zones
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ZONES=
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IPV4_ZONES=
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IPSEC_ZONES=
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[ "$IPSECFILE" = zones ] && new_zone_file=Yes || test -n "${FW:=fw}"
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while read zone type rest; do
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expandv zone type
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case $zone in
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*:*)
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parents=${zone#*:}
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zone=${zone%:*}
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[ -n "$zone" ] || startup_error "Invalid nested zone syntax: :$parents"
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parents=$(separate_list $parents)
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;;
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*)
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parents=
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;;
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esac
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for parent in $parents; do
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[ "$parent" = "$FW" ] && startup_error "Sub-zones of the firewall zone are not allowed"
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list_search $parent $ZONES || startup_error "Parent zone not defined: $parent"
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done
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[ ${#zone} -gt 5 ] && startup_error "Zone name longer than 5 characters: $zone"
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case "$zone" in
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[0-9*])
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startup_error "Illegal zone name \"$zone\" in zones file"
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;;
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all|none)
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startup_error "Reserved zone name \"$zone\" in zones file"
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;;
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esac
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if [ -n "$new_zone_file" ]; then
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case ${type:=ipv4} in
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ipv4|IPv4|IPV4|plain|-)
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list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
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merge_zone
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IPV4_ZONES="$IPV4_ZONES $zone"
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;;
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ipsec|IPSEC|ipsec4|IPSEC4)
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list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
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[ -n "$POLICY_MATCH" ] || fatal_error "Your kernel and/or iptables does not support policy match"
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eval ${zone}_is_ipsec=Yes
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eval ${zone}_is_complex=Yes
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merge_zone
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IPSEC_ZONES="$IPSEC_ZONES $zone"
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;;
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firewall)
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[ -n "$FW" ] && startup_error "Only one firewall zone may be defined"
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list_search $zone $ZONES && startup_error "Zone $zone is defined more than once"
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[ -n "$parents" ] && startup_error "The firewall zone may not be nested"
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for r in $rest; do
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[ "x$r" = x- ] || startup_error "OPTIONS not allowed on the firewall zone"
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done
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FW=$zone
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;;
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*)
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startup_error "Invalid Zone Type: $type"
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;;
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esac
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eval ${zone}_type=$type
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else
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list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
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ZONES="$ZONES $zone"
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IPV4_ZONES="$IPV4_ZONES $zone"
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eval ${zone}_type=ipv4
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fi
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done < $TMP_DIR/zones
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[ -z "$ZONES" ] && startup_error "No ipv4 or ipsec Zones Defined"
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[ -z "$FW" ] && startup_error "No Firewall Zone Defined"
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}
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#
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# Find interfaces to a given zone
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#
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# Search the variables representing the contents of the interfaces file and
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# for each record matching the passed ZONE, echo the expanded contents of
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# the "INTERFACE" column
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#
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find_interfaces() # $1 = interface zone
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{
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local zne=$1
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local z
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local interface
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for interface in $ALL_INTERFACES; do
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eval z=\$$(chain_base $interface)_zone
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[ "x${z}" = x${zne} ] && echo $interface
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done
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}
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#
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# Forward Chain for an interface
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#
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forward_chain() # $1 = interface
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{
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echo $(chain_base $1)_fwd
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}
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#
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# Input Chain for an interface
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#
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input_chain() # $1 = interface
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{
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echo $(chain_base $1)_in
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}
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#
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# Output Chain for an interface
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#
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output_chain() # $1 = interface
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{
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echo $(chain_base $1)_out
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}
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#
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# Masquerade Chain for an interface
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#
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masq_chain() # $1 = interface
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{
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echo $(chain_base $1)_masq
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}
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#
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# MAC Verification Chain for an interface
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#
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mac_chain() # $1 = interface
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{
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echo $(chain_base $1)_mac
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}
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macrecent_target() # $1 - interface
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{
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[ -n "$MACLIST_TTL" ] && echo $(chain_base $1)_rec || echo RETURN
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}
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#
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# Functions for creating dynamic zone rules
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#
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dynamic_fwd() # $1 = interface
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{
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echo $(chain_base $1)_dynf
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}
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dynamic_in() # $1 = interface
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{
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echo $(chain_base $1)_dyni
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}
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dynamic_out() # $1 = interface
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{
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echo $(chain_base $1)_dyno
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}
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dynamic_chains() #$1 = interface
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{
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local c=$(chain_base $1)
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echo ${c}_dyni ${c}_dynf ${c}_dyno
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}
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#
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# DNAT Chain from a zone
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#
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dnat_chain() # $1 = zone
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{
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echo ${1}_dnat
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}
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#
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# SNAT Chain to an interface
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#
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snat_chain() # $1 = interface
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{
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echo $(chain_base $1)_snat
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}
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#
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# ECN Chain to an interface
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#
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ecn_chain() # $1 = interface
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{
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echo $(chain_base $1)_ecn
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}
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#
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# First chains for an interface
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#
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first_chains() #$1 = interface
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{
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local c=$(chain_base $1)
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echo ${c}_fwd ${c}_in
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}
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#
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# Horrible hack to work around an iptables limitation
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#
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iprange_echo()
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{
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if [ -n "$KLUDGEFREE" ]; then
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echo "-m iprange $@"
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elif [ -f $TMP_DIR/iprange ]; then
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echo $@
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else
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echo "-m iprange $@"
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> $TMP_DIR/iprange
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fi
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}
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#
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# Get set flags (ipsets).
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#
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get_set_flags() # $1 = set name and optional [levels], $2 = src or dst
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{
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#
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# Note: There is a lot of unnecessary evaluation in this function just so my text
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# editor (kate) doesn't get lost trying to follow the shell syntax for highlighting.
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#
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local temp setname=$1 options=$2
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[ -n "$IPSET_MATCH" ] || fatal_error "Your kernel and/or iptables does not include ipset match: $1"
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case $1 in
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*\[[1-6]\])
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eval temp='${1#*\[}'
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eval temp='${temp%\]}'
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eval setname='${1%\[*}'
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while [ $temp -gt 1 ]; do
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options="$options,$2"
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temp=$(($temp - 1))
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done
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;;
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*\[*\])
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eval options='${1#*\[}'
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eval options='${options%\]}'
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eval setname='${1%\[*}'
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;;
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*)
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;;
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esac
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echo "--set ${setname#+} $options"
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}
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#
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# Horrible hack to work around an iptables limitation
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#
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physdev_echo()
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{
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if [ -n "$KLUDGEFREE" ]; then
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echo -m physdev $@
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elif [ -f $TMP_DIR/physdev ]; then
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echo $@
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else
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echo -m physdev $@
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> $TMP_DIR/physdev
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fi
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}
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|
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#
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# We allow hosts to be specified by IP address or by physdev. These two functions
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# are used to produce the proper match in a netfilter rule.
|
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#
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match_source_hosts()
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{
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if [ -n "$BRIDGING" ]; then
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case $1 in
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*:*)
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physdev_echo "--physdev-in ${1%:*} $(source_ip_range ${1#*:})"
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;;
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*.*.*.*|+*|!+*)
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echo $(source_ip_range $1)
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;;
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*)
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physdev_echo "--physdev-in $1"
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;;
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esac
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else
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echo $(source_ip_range $1)
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fi
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}
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|
|
match_dest_hosts()
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{
|
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if [ -n "$BRIDGING" ]; then
|
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case $1 in
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*:*)
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physdev_echo "--physdev-out ${1%:*} $(dest_ip_range ${1#*:})"
|
|
;;
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|
*.*.*.*|+*|!+*)
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echo $(dest_ip_range $1)
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;;
|
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*)
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physdev_echo "--physdev-out $1"
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;;
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esac
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else
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echo $(dest_ip_range $1)
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fi
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}
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|
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#
|
|
# Similarly, the source or destination in a rule can be qualified by a device name. If
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# the device is defined in /etc/shorewall/interfaces then a normal interface match is
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# generated (-i or -o); otherwise, a physdev match is generated.
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#-------------------------------------------------------------------------------------
|
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#
|
|
# loosely match the passed interface with those in /etc/shorewall/interfaces.
|
|
#
|
|
known_interface() # $1 = interface name
|
|
{
|
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local iface
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|
|
for iface in $ALL_INTERFACES ; do
|
|
if if_match $iface $1 ; then
|
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return 0
|
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fi
|
|
done
|
|
|
|
return 1
|
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}
|
|
|
|
known_port() # $1 = port name
|
|
{
|
|
local port
|
|
|
|
for port in $ALL_PORTS ; do
|
|
if if_match $port $1 ; then
|
|
return 0
|
|
fi
|
|
done
|
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|
|
return 1
|
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}
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|
|
match_source_dev()
|
|
{
|
|
if [ -n "$BRIDGING" ]; then
|
|
known_port $1 && physdev_echo "--physdev-in $1" || echo -i $1
|
|
else
|
|
echo -i $1
|
|
fi
|
|
}
|
|
|
|
match_dest_dev()
|
|
{
|
|
if [ -n "$BRIDGING" ]; then
|
|
known_port $1 && physdev_echo "--physdev-out $1" || echo -o $1
|
|
else
|
|
echo -o $1
|
|
fi
|
|
}
|
|
|
|
verify_interface()
|
|
{
|
|
known_interface $1 || { [ -n "$BRIDGING" ] && known_port $1 ; }
|
|
}
|
|
|
|
#
|
|
# Determine if communication to/from a host is encrypted using IPSEC
|
|
#
|
|
is_ipsec_host() # $1 = zone, $2 = host
|
|
{
|
|
eval local is_ipsec=\$${1}_is_ipsec
|
|
eval local hosts=\"\$${1}_ipsec_hosts\"
|
|
|
|
test -n "$is_ipsec" || list_search $2 $hosts
|
|
}
|
|
|
|
#
|
|
# Generate a match for decrypted packets
|
|
#
|
|
match_ipsec_in() # $1 = zone, $2 = host
|
|
{
|
|
if is_ipsec_host $1 $2 ; then
|
|
eval local options=\"\$${1}_ipsec_options \$${1}_ipsec_in_options\"
|
|
echo "-m policy --pol ipsec --dir in $options"
|
|
elif [ -n "$POLICY_MATCH" ]; then
|
|
echo "-m policy --pol none --dir in"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Generate a match for packets that will be encrypted
|
|
#
|
|
match_ipsec_out() # $1 = zone, $2 = host
|
|
{
|
|
if is_ipsec_host $1 $2 ; then
|
|
eval local options=\"\$${1}_ipsec_options \$${1}_ipsec_out_options\"
|
|
echo "-m policy --pol ipsec --dir out $options"
|
|
elif [ -n "$POLICY_MATCH" ]; then
|
|
echo "-m policy --pol none --dir out"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Jacket for ip_range() that takes care of iprange match
|
|
#
|
|
|
|
firewall_ip_range() # $1 = IP address or range
|
|
{
|
|
[ -n "$IPRANGE_MATCH" ] && echo $1 || ip_range $1
|
|
}
|
|
|
|
#
|
|
#
|
|
# Find hosts in a given zone
|
|
#
|
|
# Read hosts file and for each record matching the passed ZONE,
|
|
# echo the expanded contents of the "HOST(S)" column
|
|
#
|
|
find_hosts() # $1 = host zone
|
|
{
|
|
local hosts interface address addresses
|
|
|
|
while read z hosts options; do
|
|
if [ "x$(expand $z)" = "x$1" ]; then
|
|
expandv hosts
|
|
interface=${hosts%%:*}
|
|
addresses=${hosts#*:}
|
|
for address in $(separate_list $addresses); do
|
|
echo $interface:$address
|
|
done
|
|
fi
|
|
done < $TMP_DIR/hosts
|
|
}
|
|
|
|
#
|
|
# Determine the interfaces on the firewall
|
|
#
|
|
# For each zone, create a variable called ${zone}_interfaces. This
|
|
# variable contains a space-separated list of interfaces to the zone
|
|
#
|
|
determine_interfaces() {
|
|
for zone in $ZONES; do
|
|
interfaces=$(find_interfaces $zone)
|
|
interfaces=$(echo $interfaces) # Remove extra trash
|
|
eval ${zone}_interfaces=\"\$interfaces\"
|
|
done
|
|
}
|
|
|
|
#
|
|
# Determine if an interface has a given option
|
|
#
|
|
interface_has_option() # $1 = interface, #2 = option
|
|
{
|
|
local options
|
|
|
|
eval options=\$$(chain_base $1)_options
|
|
|
|
list_search $2 $options
|
|
}
|
|
|
|
#
|
|
# Determine the defined hosts in each zone and generate report
|
|
#
|
|
determine_hosts() {
|
|
for zone in $ZONES; do
|
|
hosts=$(find_hosts $zone)
|
|
hosts=$(echo $hosts) # Remove extra trash
|
|
|
|
eval interfaces=\$${zone}_interfaces
|
|
|
|
for interface in $interfaces; do
|
|
if interface_has_option $interface detectnets; then
|
|
networks=$(get_routed_networks $interface)
|
|
else
|
|
networks=0.0.0.0/0
|
|
fi
|
|
|
|
for network in $networks; do
|
|
if [ -z "$hosts" ]; then
|
|
hosts=$interface:$network
|
|
else
|
|
hosts="$hosts $interface:$network"
|
|
fi
|
|
|
|
if interface_has_option $interface routeback; then
|
|
eval ${zone}_routeback=\"$interface:$network \$${zone}_routeback\"
|
|
fi
|
|
done
|
|
done
|
|
|
|
interfaces=
|
|
|
|
for host in $hosts; do
|
|
interface=${host%:*}
|
|
if list_search $interface $interfaces; then
|
|
list_search $interface:0.0.0.0/0 $hosts && \
|
|
startup_error "Invalid zone definition for zone $zone"
|
|
list_search $interface:0/0 $hosts && \
|
|
startup_error "Invalid zone definition for zone $zone"
|
|
eval ${zone}_is_complex=Yes
|
|
else
|
|
if [ -z "$interfaces" ]; then
|
|
interfaces=$interface
|
|
else
|
|
interfaces="$interfaces $interface"
|
|
fi
|
|
fi
|
|
done
|
|
|
|
eval ${zone}_interfaces="\$interfaces"
|
|
eval ${zone}_hosts="\$hosts"
|
|
|
|
if [ -n "$hosts" ]; then
|
|
[ $VERBOSE -ge 1 ] && display_list "$zone Zone:" $hosts
|
|
else
|
|
error_message "WARNING: Zone $zone is empty"
|
|
fi
|
|
done
|
|
}
|
|
|
|
#
|
|
# Ensure that the passed zone is defined in the zones file or is the firewall
|
|
#
|
|
validate_zone() # $1 = zone
|
|
{
|
|
list_search $1 $ZONES $FW
|
|
}
|
|
#
|
|
# Ensure that the passed zone is defined in the zones file.
|
|
#
|
|
validate_zone1() # $1 = zone
|
|
{
|
|
list_search $1 $ZONES
|
|
}
|
|
|
|
#
|
|
# Validate the zone names and options in the interfaces file
|
|
#
|
|
validate_interfaces_file() {
|
|
local wildcard
|
|
local found_obsolete_option=
|
|
local z interface networks options r iface option
|
|
|
|
while read z interface networks options; do
|
|
expandv z interface networks options
|
|
r="$z $interface $networks $options"
|
|
|
|
[ "x$z" = "x-" ] && z=
|
|
|
|
if [ -n "$z" ]; then
|
|
validate_zone $z || startup_error "Invalid zone ($z) in record \"$r\""
|
|
fi
|
|
|
|
list_search $interface $ALL_INTERFACES && \
|
|
startup_error "Duplicate Interface $interface"
|
|
|
|
wildcard=
|
|
|
|
case $interface in
|
|
*:*|+)
|
|
startup_error "Invalid Interface Name: $interface"
|
|
;;
|
|
*+)
|
|
wildcard=Yes
|
|
;;
|
|
esac
|
|
|
|
ALL_INTERFACES="$ALL_INTERFACES $interface"
|
|
options=$(separate_list $options)
|
|
iface=$(chain_base $interface)
|
|
|
|
eval ${iface}_broadcast="$networks"
|
|
eval ${iface}_zone="$z"
|
|
eval ${iface}_options=\"$options\"
|
|
|
|
for option in $options; do
|
|
case $option in
|
|
-)
|
|
;;
|
|
dhcp|tcpflags|arp_filter|routefilter|maclist|logmartians|sourceroute|blacklist|proxyarp|nosmurfs|upnp|-)
|
|
;;
|
|
norfc1918)
|
|
addr=$(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 $network; then
|
|
startup_error "The 'norfc1918' option may not be specified on an interface with an RFC 1918 address. Interface:$interface"
|
|
fi
|
|
done
|
|
fi
|
|
;;
|
|
arp_ignore=*)
|
|
eval ${iface}_arp_ignore=${option#*=}
|
|
;;
|
|
arp_ignore)
|
|
eval ${iface}_arp_ignore=1
|
|
;;
|
|
detectnets)
|
|
[ -n "$wildcard" ] && \
|
|
startup_error "The \"detectnets\" option may not be used with a wild-card interface"
|
|
[ -n $EXPORT ] && \
|
|
startup_error "'detectnets' not permitted with the -e run-line option"
|
|
;;
|
|
routeback)
|
|
[ -n "$z" ] || startup_error "The routeback option may not be specified on a multi-zone interface"
|
|
;;
|
|
*)
|
|
error_message "WARNING: Invalid option ($option) in record \"$r\""
|
|
;;
|
|
esac
|
|
done
|
|
done < $TMP_DIR/interfaces
|
|
|
|
[ -z "$ALL_INTERFACES" ] && startup_error "No Interfaces Defined"
|
|
}
|
|
|
|
#
|
|
# Check that a mark value or mask is less that 256
|
|
#
|
|
verify_mark() # $1 = value to test
|
|
{
|
|
verify_mark1()
|
|
{
|
|
[ $1 -lt 256 ]
|
|
}
|
|
|
|
verify_mark2()
|
|
{
|
|
verify_mark1 $1 2> /dev/null
|
|
}
|
|
|
|
verify_mark2 $1 || fatal_error "Invalid Mark or Mask value: $1"
|
|
}
|
|
|
|
#
|
|
# Format a match by the passed MAC address
|
|
# The passed address begins with "~" and uses "-" as a separator between bytes
|
|
# Example: ~01-02-03-04-05-06
|
|
#
|
|
mac_match() # $1 = MAC address formated as described above
|
|
{
|
|
echo "--match mac --mac-source $(echo $1 | sed 's/~//;s/-/:/g')"
|
|
}
|
|
|
|
#
|
|
# 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" ]; then
|
|
ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u
|
|
elif [ "x${bcast}" != "x-" ]; then
|
|
echo $(separate_list $bcast)
|
|
fi
|
|
done
|
|
}
|
|
|
|
#
|
|
# Find interfaces that have the passed option specified
|
|
#
|
|
find_interfaces_by_option() # $1 = option
|
|
{
|
|
for interface in $ALL_INTERFACES; do
|
|
eval options=\$$(chain_base $interface)_options
|
|
list_search $1 $options && echo $interface
|
|
done
|
|
}
|
|
|
|
#
|
|
# This slightly slower version is used to find both the option and option followed
|
|
# by equal sign ("=") and a value
|
|
#
|
|
find_interfaces_by_option1() # $1 = option
|
|
{
|
|
local options option
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
eval options=\$$(chain_base $interface)_options
|
|
for option in $options; do
|
|
if [ "${option%=*}" = "$1" ]; then
|
|
echo $interface
|
|
break
|
|
fi
|
|
done
|
|
done
|
|
}
|
|
|
|
#
|
|
# Find hosts with the passed option
|
|
#
|
|
find_hosts_by_option() # $1 = option
|
|
{
|
|
local ignore hosts interface address addresses options ipsec= list
|
|
|
|
while read ignore hosts options; do
|
|
expandv options
|
|
list=$(separate_list $options)
|
|
if list_search $1 $list; then
|
|
list_search ipsec $list && ipsec=ipsec || ipsec=none
|
|
expandv hosts
|
|
interface=${hosts%%:*}
|
|
addresses=${hosts#*:}
|
|
for address in $(separate_list $addresses); do
|
|
echo ${ipsec}^$interface:$address
|
|
done
|
|
fi
|
|
done < $TMP_DIR/hosts
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
interface_has_option $interface $1 && \
|
|
echo none^${interface}:0.0.0.0/0
|
|
done
|
|
}
|
|
|
|
#
|
|
# Flush and delete all user-defined chains in the filter table
|
|
#
|
|
deleteallchains() {
|
|
run_iptables -F
|
|
run_iptables -X
|
|
}
|
|
|
|
#
|
|
# Process the routestopped file either adding or deleting rules
|
|
#
|
|
process_routestopped() # $1 = command
|
|
{
|
|
local hosts= interface host host1 options networks source= dest= matched
|
|
|
|
while read interface host options; do
|
|
expandv interface host options
|
|
[ "x$host" = "x-" -o -z "$host" ] && host=0.0.0.0/0
|
|
for h in $(separate_list $host); do
|
|
hosts="$hosts $interface:$h"
|
|
done
|
|
|
|
routeback=
|
|
|
|
if [ -n "$options" ]; then
|
|
for option in $(separate_list $options); do
|
|
case $option in
|
|
routeback)
|
|
if [ -n "$routeback" ]; then
|
|
error_message "WARNING: Duplicate routestopped option ignored: routeback"
|
|
else
|
|
routeback=Yes
|
|
for h in $(separate_list $host); do
|
|
run_iptables $1 FORWARD -i $interface -o $interface $(both_ip_ranges $h $h) -j ACCEPT
|
|
done
|
|
fi
|
|
;;
|
|
source)
|
|
for h in $(separate_list $host); do
|
|
source="$source $interface:$h"
|
|
done
|
|
;;
|
|
dest)
|
|
for h in $(separate_list $host); do
|
|
dest="$dest $interface:$h"
|
|
done
|
|
;;
|
|
critical)
|
|
;;
|
|
*)
|
|
error_message "WARNING: Unknown routestopped option ignored: $option"
|
|
;;
|
|
esac
|
|
done
|
|
fi
|
|
|
|
done < $TMP_DIR/routestopped
|
|
|
|
|
|
for host in $hosts; do
|
|
interface=${host%:*}
|
|
networks=${host#*:}
|
|
run_iptables $1 INPUT -i $interface $(source_ip_range $networks) -j ACCEPT
|
|
[ -z "$ADMINISABSENTMINDED" -o $COMMAND != stop ] && \
|
|
run_iptables $1 OUTPUT -o $interface $(dest_ip_range $networks) -j ACCEPT
|
|
|
|
matched=
|
|
|
|
if list_search $host $source ; then
|
|
run_iptables $1 FORWARD -i $interface $(source_ip_range $networks) -j ACCEPT
|
|
matched=Yes
|
|
fi
|
|
|
|
if list_search $host $dest ; then
|
|
run_iptables $1 FORWARD -o $interface $(dest_ip_range $networks) -j ACCEPT
|
|
matched=Yes
|
|
fi
|
|
|
|
if [ -z "$matched" ]; then
|
|
for host1 in $hosts; do
|
|
[ "$host" != "$host1" ] && run_iptables $1 FORWARD -i $interface -o ${host1%:*} $(both_ip_ranges $networks ${host1#*:}) -j ACCEPT
|
|
done
|
|
fi
|
|
done
|
|
}
|
|
|
|
process_criticalhosts()
|
|
{
|
|
local hosts= interface host h options networks criticalhosts=
|
|
|
|
[ -f $TMP_DIR/routestopped ] || strip_file routestopped
|
|
|
|
while read interface host options; do
|
|
expandv interface host options
|
|
|
|
[ "x$host" = "x-" -o -z "$host" ] && host=0.0.0.0/0 || host=$(separate_list $host)
|
|
|
|
if [ -n "$options" ]; then
|
|
for option in $(separate_list $options); do
|
|
case $option in
|
|
routeback|source|dest)
|
|
;;
|
|
critical)
|
|
for h in $host; do
|
|
criticalhosts="$criticalhosts $interface:$h"
|
|
done
|
|
;;
|
|
*)
|
|
error_message "WARNING: Unknown routestopped option ignored: $option"
|
|
;;
|
|
esac
|
|
done
|
|
fi
|
|
done < $TMP_DIR/routestopped
|
|
|
|
if [ -n "$criticalhosts" ]; then
|
|
CRITICALHOSTS=$criticalhosts
|
|
progress_message "Critical Hosts are:$CRITICALHOSTS"
|
|
fi
|
|
|
|
}
|
|
|
|
#
|
|
# 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#*:}
|
|
$IPTABLES -A INPUT -i $interface $(source_ip_range $networks) -j ACCEPT
|
|
$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#*:}
|
|
$IPTABLES -D INPUT -i $interface $(source_ip_range $networks) -j ACCEPT
|
|
$IPTABLES -D OUTPUT -o $interface $(dest_ip_range $networks) -j ACCEPT
|
|
done
|
|
}
|
|
|
|
#
|
|
# Stop the Firewall
|
|
#
|
|
stop_firewall() {
|
|
#
|
|
# Turn off trace unless we were tracing "stop" or "clear"
|
|
#
|
|
|
|
[ -n "$RESTOREBASE" ] && rm -f $RESTOREBASE
|
|
|
|
case $COMMAND in
|
|
stop|clear)
|
|
;;
|
|
*)
|
|
set +x
|
|
|
|
[ -n "${RESTOREFILE:=restore}" ]
|
|
|
|
RESTOREPATH=/var/lib/shorewall/$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 Shorewall...
|
|
|
|
if $RESTOREPATH restore; then
|
|
echo "Shorewall restored from $RESTOREPATH"
|
|
set_state "Started"
|
|
else
|
|
set_state "Unknown"
|
|
fi
|
|
|
|
my_mutex_off
|
|
kill $$
|
|
exit 2
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
set_state "Stopping"
|
|
|
|
STOPPING="Yes"
|
|
|
|
TERMINATOR=
|
|
|
|
deletechain shorewall
|
|
|
|
run_user_exit stop
|
|
|
|
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
|
|
|
|
delete_proxy_arp
|
|
[ -n "$CLEAR_TC" ] && delete_tc1
|
|
|
|
[ -n "$DISABLE_IPV6" ] && disable_ipv6
|
|
|
|
process_criticalhosts
|
|
|
|
if [ -n "$CRITICALHOSTS" ]; then
|
|
if [ -z "$ADMINISABSENTMINDED" ]; then
|
|
for chain in INPUT OUTPUT; do
|
|
setpolicy $chain ACCEPT
|
|
done
|
|
|
|
setpolicy FORWARD DROP
|
|
|
|
deleteallchains
|
|
|
|
enable_critical_hosts
|
|
|
|
for chain in INPUT OUTPUT; do
|
|
setpolicy $chain DROP
|
|
done
|
|
else
|
|
for chain in INPUT OUTPUT; do
|
|
setpolicy $chain ACCEPT
|
|
done
|
|
|
|
setpolicy FORWARD DROP
|
|
|
|
deleteallchains
|
|
|
|
enable_critical_hosts
|
|
|
|
setpolicy INPUT DROP
|
|
|
|
for chain in INPUT FORWARD; do
|
|
setcontinue $chain
|
|
done
|
|
fi
|
|
elif [ -z "$ADMINISABSENTMINDED" ]; then
|
|
for chain in INPUT OUTPUT FORWARD; do
|
|
setpolicy $chain DROP
|
|
done
|
|
|
|
deleteallchains
|
|
else
|
|
for chain in INPUT FORWARD; do
|
|
setpolicy $chain DROP
|
|
done
|
|
|
|
setpolicy OUTPUT ACCEPT
|
|
|
|
deleteallchains
|
|
|
|
for chain in INPUT FORWARD; do
|
|
setcontinue $chain
|
|
done
|
|
fi
|
|
|
|
process_routestopped -A
|
|
|
|
$IPTABLES -A INPUT -i lo -j ACCEPT
|
|
[ -z "$ADMINISABSENTMINDED" ] && \
|
|
$IPTABLES -A OUTPUT -o lo -j ACCEPT
|
|
|
|
for interface in $(find_interfaces_by_option dhcp); do
|
|
$IPTABLES -A INPUT -p udp -i $interface --dport 67:68 -j ACCEPT
|
|
[ -z "$ADMINISABSENTMINDED" ] && \
|
|
$IPTABLES -A OUTPUT -p udp -o $interface --dport 67:68 -j ACCEPT
|
|
#
|
|
# This might be a bridge
|
|
#
|
|
$IPTABLES -A FORWARD -p udp -i $interface -o $interface --dport 67:68 -j ACCEPT
|
|
done
|
|
|
|
case "$IP_FORWARDING" in
|
|
[Oo][Nn])
|
|
echo 1 > /proc/sys/net/ipv4/ip_forward
|
|
progress_message2 "IP Forwarding Enabled"
|
|
;;
|
|
[Oo][Ff][Ff])
|
|
echo 0 > /proc/sys/net/ipv4/ip_forward
|
|
progress_message2 "IP Forwarding Disabled!"
|
|
;;
|
|
esac
|
|
|
|
run_user_exit stopped
|
|
|
|
set_state "Stopped"
|
|
|
|
logger "Shorewall Stopped"
|
|
|
|
rm -rf $TMP_DIR
|
|
|
|
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
|
|
#
|
|
my_mutex_off
|
|
kill $$
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Remove all rules and remove all user-defined chains
|
|
#
|
|
clear_firewall() {
|
|
stop_firewall
|
|
|
|
setpolicy INPUT ACCEPT
|
|
setpolicy FORWARD ACCEPT
|
|
setpolicy OUTPUT ACCEPT
|
|
|
|
run_iptables -F
|
|
|
|
echo 1 > /proc/sys/net/ipv4/ip_forward
|
|
|
|
if [ -n "$DISABLE_IPV6" ] && 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
|
|
|
|
run_user_exit clear
|
|
|
|
set_state "Cleared"
|
|
|
|
logger "Shorewall Cleared"
|
|
}
|
|
|
|
#
|
|
# Process the ipsec information in the zones file
|
|
#
|
|
setup_ipsec() {
|
|
local zone using_ipsec=
|
|
|
|
do_options() # $1 = _in, _out or "" - $2 = option list
|
|
{
|
|
local option opts newoptions= val
|
|
|
|
[ x${2} = x- ] && return
|
|
|
|
opts=$(separate_list $2)
|
|
|
|
for option in $opts; do
|
|
val=${option#*=}
|
|
|
|
case $option in
|
|
mss=[0-9]*) ;;
|
|
strict) newoptions="$newoptions --strict" ;;
|
|
next) newoptions="$newoptions --next" ;;
|
|
reqid=*) newoptions="$newoptions --reqid $val" ;;
|
|
spi=*) newoptions="$newoptions --spi $val" ;;
|
|
proto=*) newoptions="$newoptions --proto $val" ;;
|
|
mode=*) newoptions="$newoptions --mode $val" ;;
|
|
tunnel-src=*) newoptions="$newoptions --tunnel-src $val" ;;
|
|
tunnel-dst=*) newoptions="$newoptions --tunnel-dst $val" ;;
|
|
reqid!=*) newoptions="$newoptions ! --reqid $val" ;;
|
|
spi!=*) newoptions="$newoptions ! --spi $val" ;;
|
|
proto!=*) newoptions="$newoptions ! --proto $val" ;;
|
|
mode!=*) newoptions="$newoptions ! --mode $val" ;;
|
|
tunnel-src!=*) newoptions="$newoptions ! --tunnel-src $val" ;;
|
|
tunnel-dst!=*) newoptions="$newoptions ! --tunnel-dst $val" ;;
|
|
*) fatal_error "Invalid option \"$option\" for zone $zone" ;;
|
|
esac
|
|
done
|
|
|
|
if [ -n "$newoptions" ]; then
|
|
[ -n "$POLICY_MATCH" ] || fatal_error "Your kernel and/or iptables does not support policy match"
|
|
eval ${zone}_is_complex=Yes
|
|
eval ${zone}_ipsec${1}_options=\"${newoptions# }\"
|
|
fi
|
|
}
|
|
|
|
case $IPSECFILE in
|
|
zones)
|
|
f=zones
|
|
progress_message "Setting up IPSEC..."
|
|
;;
|
|
*)
|
|
f=$IPSECFILE
|
|
strip_file $f
|
|
progress_message "Processing $f..."
|
|
using_ipsec=Yes
|
|
;;
|
|
esac
|
|
|
|
while read zone type options in_options out_options mss; do
|
|
expandv zone type options in_options out_options mss
|
|
|
|
if [ -n "$using_ipsec" ]; then
|
|
validate_zone1 $zone || fatal_error "Unknown zone: $zone"
|
|
fi
|
|
|
|
if [ -n "$type" ]; then
|
|
if [ -n "$using_ipsec" ]; then
|
|
case $type in
|
|
No|no)
|
|
;;
|
|
Yes|yes)
|
|
[ -n "$POLICY_MATCH" ] || fatal_error "Your kernel and/or iptables does not support policy match"
|
|
eval ${zone}_is_ipsec=Yes
|
|
eval ${zone}_is_complex=Yes
|
|
eval ${zone}_type=ipsec4
|
|
;;
|
|
*)
|
|
fatal_error "Invalid IPSEC column contents"
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
do_options "" $options
|
|
do_options "_in" $in_options
|
|
do_options "_out" $out_options
|
|
fi
|
|
|
|
done < $TMP_DIR/$f
|
|
}
|
|
|
|
#
|
|
# Delete existing Proxy ARP
|
|
#
|
|
delete_proxy_arp() {
|
|
if [ -f /var/lib/shorewall/proxyarp ]; then
|
|
while read address interface external haveroute; do
|
|
case $COMMAND in
|
|
stop|clear)
|
|
qt arp -i $external -d $address pub
|
|
[ -z "${haveroute}${NOROUTES}" ] && qt ip route del $address dev $interface
|
|
;;
|
|
*)
|
|
if [ -n "$STOPPING" ]; then
|
|
qt arp -i $external -d $address pub
|
|
qt arp -i $external -d $address pub
|
|
[ -z "${haveroute}${NOROUTES}" ] && qt ip route del $address dev $interface
|
|
else
|
|
qt arp -i $external -d $address pub
|
|
if [ -z "$haveroute" ];then
|
|
[ -n "$NOROUTE" ] || qt ip route del $address dev $interface
|
|
fi
|
|
fi
|
|
;;
|
|
esac
|
|
done < /var/lib/shorewall/proxyarp
|
|
|
|
rm -f /var/lib/shorewall/proxyarp
|
|
fi
|
|
|
|
[ -d $STATEDIR ] && touch $STATEDIR/proxyarp
|
|
|
|
case $COMMAND in
|
|
stop|clear)
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f $f/proxy_arp ] && echo 0 > $f/proxy_arp
|
|
done
|
|
;;
|
|
*)
|
|
if [ -n "$STOPPING" ]; then
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f $f/proxy_arp ] && echo 0 > $f/proxy_arp
|
|
done
|
|
else
|
|
for f in /proc/sys/net/ipv4/conf/*; do
|
|
[ -f $f/proxy_arp ] && echo 0 > $f/proxy_arp
|
|
done
|
|
fi
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Delete existing Static NAT
|
|
#
|
|
delete_nat() {
|
|
run_iptables -t nat -F
|
|
run_iptables -t nat -X
|
|
|
|
if [ -f /var/lib/shorewall/nat ]; then
|
|
while read external interface; do
|
|
qt ip addr del $external dev $interface
|
|
done < /var/lib/shorewall/nat
|
|
|
|
rm -f {/var/lib/shorewall}/nat
|
|
fi
|
|
|
|
[ -d $STATEDIR ] && touch $STATEDIR/nat
|
|
}
|
|
|
|
#
|
|
# Setup Network Mapping (NETMAP)
|
|
#
|
|
setup_netmap() {
|
|
|
|
while read type net1 interface net2 ; do
|
|
expandv type net1 interface net2
|
|
|
|
list_search $interface $ALL_INTERFACES || \
|
|
fatal_error "Unknown interface $interface in entry \"$type $net1 $interface $net2\""
|
|
|
|
case $type in
|
|
DNAT)
|
|
addnatrule $(input_chain $interface) -d $net1 -j NETMAP --to $net2
|
|
;;
|
|
SNAT)
|
|
addnatrule $(output_chain $interface) -s $net1 -j NETMAP --to $net2
|
|
;;
|
|
*)
|
|
fatal_error "Invalid type $type in entry \"$type $net1 $interface $net2\""
|
|
;;
|
|
esac
|
|
|
|
progress_message " Network $net1 on $interface mapped to $net2 ($type)"
|
|
|
|
done < $TMP_DIR/netmap
|
|
}
|
|
|
|
#
|
|
# Setup ECN disabling rules
|
|
#
|
|
setup_ecn() # $1 = file name
|
|
{
|
|
local interfaces=""
|
|
local hosts=
|
|
local h
|
|
|
|
strip_file ecn $1
|
|
|
|
progress_message2 "Processing $1..."
|
|
|
|
while read interface host; do
|
|
expandv interface host
|
|
list_search $interface $ALL_INTERFACES || \
|
|
startup_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 "Setting up ECN control on${interfaces}..."
|
|
|
|
for interface in $interfaces; do
|
|
chain=$(ecn_chain $interface)
|
|
if havemanglechain $chain; then
|
|
flushmangle $chain
|
|
else
|
|
createmanglechain $chain
|
|
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
|
|
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 " ECN Disabled to $h through $interface"
|
|
done
|
|
fi
|
|
}
|
|
|
|
# Display elements of a list with leading white space
|
|
#
|
|
display_list() # $1 = List Title, rest of $* = list to display
|
|
{
|
|
[ $# -gt 1 ] && echo " $*"
|
|
}
|
|
|
|
#
|
|
# Add a record to the blacklst chain
|
|
#
|
|
# $source = address match
|
|
# $proto = protocol selector
|
|
# $dport = destination port selector
|
|
#
|
|
add_blacklist_rule() {
|
|
if [ -n "$BLACKLIST_LOGLEVEL" ]; then
|
|
log_rule $BLACKLIST_LOGLEVEL blacklst $BLACKLIST_DISPOSITION $(fix_bang $source $proto $dport)
|
|
fi
|
|
|
|
run_iptables2 -A blacklst $source $proto $dport -j $disposition
|
|
}
|
|
|
|
#
|
|
# 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 " $addr added to Black List"
|
|
done
|
|
}
|
|
|
|
#
|
|
# Refresh the Black List
|
|
#
|
|
refresh_blacklist() {
|
|
local f=$(find_file blacklist)
|
|
local disposition=$BLACKLIST_DISPOSITION
|
|
|
|
if qt $IPTABLES -L blacklst -n ; then
|
|
progress_message2 "Loading Black List..."
|
|
|
|
strip_file blacklist $f
|
|
|
|
[ "$disposition" = REJECT ] && disposition=reject
|
|
|
|
run_iptables -F blacklst
|
|
|
|
while read networks protocol ports; do
|
|
expandv networks protocol ports
|
|
process_blacklist_rec
|
|
done < $TMP_DIR/blacklist
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Verify the Black List
|
|
#
|
|
validate_blacklist() {
|
|
local f=$(find_file blacklist)
|
|
local disposition=$BLACKLIST_DISPOSITION
|
|
|
|
progress_message2 "Checking Black List..."
|
|
|
|
strip_file blacklist $f
|
|
|
|
[ "$disposition" = REJECT ] && disposition=reject
|
|
|
|
while read networks protocol ports; do
|
|
expandv networks protocol ports
|
|
process_blacklist_rec
|
|
done < $TMP_DIR/blacklist
|
|
}
|
|
|
|
#
|
|
# Verify that kernel has netfilter support
|
|
#
|
|
verify_os_version() {
|
|
|
|
osversion=$(uname -r)
|
|
|
|
case $osversion in
|
|
2.4.*|2.5.*|2.6.*)
|
|
;;
|
|
*)
|
|
startup_error "Shorewall version $VERSION does not work with kernel version $osversion"
|
|
;;
|
|
esac
|
|
|
|
[ $COMMAND = start -a -n "$(lsmod 2> /dev/null | grep '^ipchains')" ] && \
|
|
startup_error "Shorewall can't start with the ipchains kernel module loaded - see FAQ #8"
|
|
}
|
|
|
|
#
|
|
# Check for disabled startup
|
|
#
|
|
check_disabled_startup() {
|
|
if [ -z "$STARTUP_ENABLED" ]; then
|
|
echo " Shorewall Startup is disabled -- to enable startup"
|
|
echo " after you have completed Shorewall configuration,"
|
|
echo " change the setting of STARTUP_ENABLED to Yes in"
|
|
echo " /etc/shorewall/shorewall.conf"
|
|
|
|
[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
|
|
my_mutex_off
|
|
exit 2
|
|
fi
|
|
}
|
|
|
|
#
|
|
# tc4shorewall uses this function to report progress
|
|
#
|
|
progress_message_and_save()
|
|
{
|
|
progress_message $@
|
|
}
|
|
|
|
#
|
|
# Refresh queuing and classes
|
|
#
|
|
refresh_tc() {
|
|
|
|
echo "Refreshing Traffic Control Rules..."
|
|
|
|
[ -n "$CLEAR_TC" ] && delete_tc1
|
|
|
|
[ -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
|
|
#
|
|
$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 $chain
|
|
done
|
|
|
|
#
|
|
# Process the TC Rules File
|
|
#
|
|
strip_file tcrules
|
|
|
|
while read mark sources dests proto ports sports user testval; do
|
|
expandv mark sources dests proto ports sports user testval tos
|
|
rule=$(echo "$mark $sources $dests $proto $ports $sports $user $testval $tos")
|
|
process_tc_rule
|
|
done < $TMP_DIR/tcrules
|
|
|
|
if [ -n "$TC_SCRIPT" ]; then
|
|
run_user_exit $TC_SCRIPT
|
|
elif [ -n "$TC_ENABLED" ]; then
|
|
setup_traffic_shaping
|
|
fi
|
|
|
|
}
|
|
|
|
#
|
|
# Refresh the firewall
|
|
#
|
|
refresh_firewall()
|
|
{
|
|
DOING=Refreshing
|
|
DONE=Refreshed
|
|
|
|
progress_message3 "Refreshing Shorewall..."
|
|
|
|
progress_message2 "Determining Zones and Interfaces..."
|
|
|
|
determine_zones
|
|
|
|
validate_interfaces_file
|
|
|
|
determine_interfaces
|
|
|
|
run_user_exit refresh
|
|
|
|
#
|
|
# Blacklist
|
|
#
|
|
refresh_blacklist
|
|
|
|
ecn=$(find_file ecn)
|
|
|
|
[ -f $ecn ] && [ -n "$MANGLE_ENABLED" ] && setup_ecn $ecn
|
|
|
|
#
|
|
# Refresh Traffic Control
|
|
#
|
|
[ -n "$MANGLE_ENABLED" ] && refresh_tc
|
|
|
|
run_user_exit refreshed
|
|
|
|
report "Shorewall Refreshed"
|
|
|
|
rm -rf $TMP_DIR
|
|
}
|
|
|
|
#
|
|
# Add a host or networks to a zone
|
|
#
|
|
add_to_zone() # $1...${n-1} = <interface>[:<hosts>] $n = zone
|
|
{
|
|
local interface host zone z h z1 z2 chain
|
|
local dhcp_interfaces blacklist_interfaces maclist_interfaces
|
|
local tcpflags_interfaces newhostlist=
|
|
local rulenum source_chain dest_hosts iface hosts hostlist=
|
|
|
|
nat_chain_exists() # $1 = chain name
|
|
{
|
|
qt $IPTABLES -t nat -L $1 -n
|
|
}
|
|
|
|
do_iptables() # $@ = command
|
|
{
|
|
[ -n "$BRIDGING" ] && [ -f $TMP_DIR/physdev ] && rm -f $TMP_DIR/physdev
|
|
[ -n "$IPRANGE_MATCH" ] && [ -f $TMP_DIR/iprange ] && rm -f $TMP_DIR/iprange
|
|
|
|
if ! $IPTABLES $@ ; then
|
|
error_message "ERROR: Can't add $newhost to zone $zone"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Load $zones
|
|
#
|
|
determine_zones
|
|
#
|
|
# Validate Interfaces File
|
|
#
|
|
validate_interfaces_file
|
|
#
|
|
# Validate Hosts File
|
|
#
|
|
validate_hosts_file
|
|
#
|
|
# Validate IPSec File
|
|
#
|
|
f=$(find_file $IPSECFILE)
|
|
|
|
[ -f $f ] && setup_ipsec $f
|
|
#
|
|
# Normalize host list
|
|
#
|
|
while [ $# -gt 1 ]; do
|
|
interface=${1%%:*}
|
|
host=${1#*:}
|
|
#
|
|
# Be sure that the interface was dynamic at last [re]start
|
|
#
|
|
if ! chain_exists $(input_chain $interface) ; then
|
|
startup_error "Unknown interface $interface"
|
|
fi
|
|
|
|
if ! chain_exists $(dynamic_in $interface) ; then
|
|
startup_error "At last Shorewall [re]start, DYNAMIC_ZONES=No in shorewall.conf"
|
|
fi
|
|
|
|
if [ -z "$host" ]; then
|
|
hostlist="$hostlist $interface:0.0.0.0/0"
|
|
else
|
|
for h in $(separate_list $host); do
|
|
hostlist="$hostlist $interface:$h"
|
|
done
|
|
fi
|
|
|
|
shift
|
|
done
|
|
#
|
|
# Validate Zone
|
|
#
|
|
zone=$1
|
|
|
|
validate_zone $zone || startup_error "Unknown zone: $zone"
|
|
|
|
[ "$zone" = $FW ] && startup_error "Can't add $1 to firewall zone"
|
|
|
|
#
|
|
# Be sure that Shorewall has been restarted using a DZ-aware version of the code
|
|
#
|
|
[ -f /var/lib/shorewall/chains ] || startup_error "/var/lib/shorewall/chains -- file not found"
|
|
[ -f /var/lib/shorewall/zones ] || startup_error "/var/lib/shorewall/zones -- file not found"
|
|
#
|
|
# Check for duplicates and create a new zone state file
|
|
#
|
|
> /var/lib/shorewall/zones_$$
|
|
|
|
while read z type hosts; do
|
|
if [ "$z" = "$zone" ]; then
|
|
for h in $hostlist; do
|
|
list_search $h $hosts
|
|
if [ "$?" -gt 0 ]; then
|
|
newhostlist="$newhostlist $h"
|
|
else
|
|
error_message "$h already in zone $zone"
|
|
fi
|
|
done
|
|
|
|
[ -z "$hosts" ] && hosts=$newhostlist || hosts="$hosts $newhostlist"
|
|
fi
|
|
|
|
eval ${z}_hosts=\"$hosts\"
|
|
|
|
echo "$z $type $hosts" >> /var/lib/shorewall/zones_$$
|
|
done < /var/lib/shorewall/zones
|
|
|
|
mv -f /var/lib/shorewall/zones_$$ /var/lib/shorewall/zones
|
|
|
|
TERMINATOR=fatal_error
|
|
#
|
|
# Create a new Zone state file
|
|
#
|
|
for newhost in $newhostlist; do
|
|
#
|
|
# Isolate interface and host parts
|
|
#
|
|
interface=${newhost%%:*}
|
|
host=${newhost#*:}
|
|
#
|
|
# If the zone passed in the command has a dnat chain then insert a rule in
|
|
# the nat table PREROUTING chain to jump to that chain when the source
|
|
# matches the new host(s)#
|
|
#
|
|
chain=${zone}_dnat
|
|
|
|
if nat_chain_exists $chain; then
|
|
do_iptables -t nat -A $(dynamic_in $interface) $(source_ip_range $host) $(match_ipsec_in $zone $newhost) -j $chain
|
|
fi
|
|
#
|
|
# Insert new rules into the filter table for the passed interface
|
|
#
|
|
while read z1 z2 chain; do
|
|
[ "$z1" = "$z2" ] && op="-I" || op="-A"
|
|
if [ "$z1" = "$zone" ]; then
|
|
if [ "$z2" = "$FW" ]; then
|
|
do_iptables $op $(dynamic_in $interface) $(match_source_hosts $host) $(match_ipsec_in $z1 $newhost) -j $chain
|
|
else
|
|
source_chain=$(dynamic_fwd $interface)
|
|
if is_ipsec_host $z1 $newhost ; then
|
|
do_iptables $op $source_chain $(match_source_hosts $host) $(match_ipsec_in $z1 $newhost) -j ${z1}_frwd
|
|
else
|
|
eval dest_hosts=\"\$${z2}_hosts\"
|
|
|
|
for h in $dest_hosts; do
|
|
iface=${h%%:*}
|
|
hosts=${h#*:}
|
|
|
|
if [ "$iface" != "$interface" -o "$hosts" != "$host" ]; then
|
|
do_iptables $op $source_chain $(match_source_hosts $host) -o $iface $(match_dest_hosts $hosts) $(match_ipsec_out $z2 $h) -j $chain
|
|
fi
|
|
done
|
|
fi
|
|
fi
|
|
elif [ "$z2" = "$zone" ]; then
|
|
if [ "$z1" = "$FW" ]; then
|
|
#
|
|
# Add a rule to the dynamic out chain for the interface
|
|
#
|
|
do_iptables $op $(dynamic_out $interface) $(match_dest_hosts $host) $(match_ipsec_out $z2 $newhost) -j $chain
|
|
else
|
|
eval source_hosts=\"\$${z1}_hosts\"
|
|
|
|
for h in $source_hosts; do
|
|
iface=${h%%:*}
|
|
hosts=${h#*:}
|
|
|
|
if [ "$iface" != "$interface" -o "$hosts" != "$host" ]; then
|
|
if is_ipsec_host $z1 $h; then
|
|
do_iptables $op ${z1}_dyn -o $interface $(match_dest_hosts $host) $(match_ipsec_out $z2 $newhost) -j $chain
|
|
else
|
|
do_iptables $op $(dynamic_fwd $iface) $(match_source_hosts $hosts) -o $interface $(match_dest_hosts $host) $(match_ipsec_out $z2 $newhost) -j $chain
|
|
fi
|
|
fi
|
|
done
|
|
fi
|
|
fi
|
|
done < /var/lib/shorewall/chains
|
|
|
|
progress_message "$newhost added to zone $zone"
|
|
|
|
done
|
|
|
|
rm -rf $TMP_DIR
|
|
}
|
|
|
|
#
|
|
# Delete a host or networks from a zone
|
|
#
|
|
delete_from_zone() # $1 = <interface>[:<hosts>] $2 = zone
|
|
{
|
|
local interface host zone z h z1 z2 chain delhost
|
|
local dhcp_interfaces blacklist_interfaces maclist_interfaces tcpflags_interfaces
|
|
local rulenum source_chain dest_hosts iface hosts hostlist=
|
|
|
|
#
|
|
# Load $zones
|
|
#
|
|
determine_zones
|
|
#
|
|
# Validate Interfaces File
|
|
#
|
|
validate_interfaces_file
|
|
#
|
|
# Validate Hosts File
|
|
#
|
|
validate_hosts_file
|
|
#
|
|
# Validate IPSec File
|
|
#
|
|
f=$(find_file ipsec)
|
|
|
|
[ -f $f ] && setup_ipsec $f
|
|
|
|
#
|
|
# Normalize host list
|
|
#
|
|
while [ $# -gt 1 ]; do
|
|
interface=${1%%:*}
|
|
host=${1#*:}
|
|
#
|
|
# Be sure that the interface was dynamic at last [re]start
|
|
#
|
|
if ! chain_exists $(input_chain $interface) ; then
|
|
startup_error "Unknown interface $interface"
|
|
fi
|
|
|
|
if ! chain_exists $(dynamic_in $interface) ; then
|
|
startup_error "At last Shorewall [re]start, DYNAMIC_ZONES=No in shorewall.conf"
|
|
fi
|
|
|
|
if [ -z "$host" ]; then
|
|
hostlist="$hostlist $interface:0.0.0.0/0"
|
|
else
|
|
for h in $(separate_list $host); do
|
|
hostlist="$hostlist $interface:$h"
|
|
done
|
|
fi
|
|
|
|
shift
|
|
done
|
|
#
|
|
# Validate Zone
|
|
#
|
|
zone=$1
|
|
|
|
validate_zone $zone || startup_error "Unknown zone: $zone"
|
|
|
|
[ "$zone" = $FW ] && startup_error "Can't delete from the firewall zone"
|
|
|
|
#
|
|
# Be sure that Shorewall has been restarted using a DZ-aware version of the code
|
|
#
|
|
[ -f /var/lib/shorewall/chains ] || startup_error "/var/lib/shorewall/chains -- file not found"
|
|
[ -f /var/lib/shorewall/zones ] || startup_error "/var/lib/shorewall/zones -- file not found"
|
|
#
|
|
# Delete the passed hosts from the zone state file
|
|
#
|
|
> /var/lib/shorewall/zones_$$
|
|
|
|
while read z hosts; do
|
|
if [ "$z" = "$zone" ]; then
|
|
temp=$hosts
|
|
hosts=
|
|
|
|
for host in $hostlist; do
|
|
found=
|
|
for h in $temp; do
|
|
if [ "$h" = "$host" ]; then
|
|
found=Yes
|
|
break
|
|
fi
|
|
done
|
|
|
|
[ -n "$found" ] || error_message "WARNING: $host does not appear to be in zone $zone"
|
|
done
|
|
|
|
for h in $temp; do
|
|
found=
|
|
for host in $hostlist; do
|
|
if [ "$h" = "$host" ]; then
|
|
found=Yes
|
|
break
|
|
fi
|
|
done
|
|
|
|
[ -n "$found" ] || hosts="$hosts $h"
|
|
done
|
|
fi
|
|
|
|
eval ${z}_hosts=\"$hosts\"
|
|
|
|
echo "$z $hosts" >> /var/lib/shorewall/zones_$$
|
|
done < /var/lib/shorewall/zones
|
|
|
|
mv -f /var/lib/shorewall/zones_$$ /var/lib/shorewall/zones
|
|
|
|
TERMINATOR=fatal_error
|
|
|
|
for delhost in $hostlist; do
|
|
interface=${delhost%%:*}
|
|
host=${delhost#*:}
|
|
#
|
|
# Delete any nat table entries for the host(s)
|
|
#
|
|
qt_iptables -t nat -D $(dynamic_in $interface) $(match_source_hosts $host) $(match_ipsec_in $zone $delhost) -j ${zone}_dnat
|
|
#
|
|
# Delete rules rules the input chains for the passed interface
|
|
#
|
|
while read z1 z2 chain; do
|
|
if [ "$z1" = "$zone" ]; then
|
|
if [ "$z2" = "$FW" ]; then
|
|
qt_iptables -D $(dynamic_in $interface) $(match_source_hosts $host) $(match_ipsec_in $z1 $delhost) -j $chain
|
|
else
|
|
source_chain=$(dynamic_fwd $interface)
|
|
if is_ipsec_host $z1 $delhost ; then
|
|
qt_iptables -D $source_chain $(match_source_hosts $host) $(match_ipsec_in $z1 $newhost) -j ${z1}_frwd
|
|
else
|
|
eval dest_hosts=\"\$${z2}_hosts\"
|
|
|
|
[ "$z2" = "$zone" ] && dest_hosts="$dest_hosts $hostlist"
|
|
|
|
for h in $dest_hosts; do
|
|
iface=${h%%:*}
|
|
hosts=${h#*:}
|
|
|
|
if [ "$iface" != "$interface" -o "$hosts" != "$host" ]; then
|
|
qt_iptables -D $source_chain $(match_source_hosts $host) -o $iface $(match_dest_hosts $hosts) $(match_ipsec_out $z2 $h) -j $chain
|
|
fi
|
|
done
|
|
fi
|
|
fi
|
|
elif [ "$z2" = "$zone" ]; then
|
|
if [ "$z1" = "$FW" ]; then
|
|
qt_iptables -D $(dynamic_out $interface) $(match_dest_hosts $host) $(match_ipsec_out $z2 $delhost) -j $chain
|
|
else
|
|
eval source_hosts=\"\$${z1}_hosts\"
|
|
|
|
for h in $source_hosts; do
|
|
iface=${h%%:*}
|
|
hosts=${h#*:}
|
|
|
|
if [ "$iface" != "$interface" -o "$hosts" != "$host" ]; then
|
|
if is_ipsec_host $z1 $h; then
|
|
qt_iptables -D ${z1}_dyn -o $interface $(match_dest_hosts $host) $(match_ipsec_out $z2 $delhost) -j $chain
|
|
else
|
|
qt_iptables -D $(dynamic_fwd $iface) $(match_source_hosts $hosts) -o $interface $(match_dest_hosts $host) $(match_ipsec_out $z2 $delhost) -j $chain
|
|
fi
|
|
fi
|
|
done
|
|
fi
|
|
fi
|
|
done < /var/lib/shorewall/chains
|
|
|
|
progress_message "$delhost removed from zone $zone"
|
|
|
|
done
|
|
|
|
rm -rf $TMP_DIR
|
|
}
|
|
|
|
#
|
|
# Determine the value for a parameter that defaults to Yes
|
|
#
|
|
added_param_value_yes() # $1 = Parameter Name, $2 = Parameter value
|
|
{
|
|
local val="$2"
|
|
|
|
if [ -z "$val" ]; then
|
|
echo "Yes"
|
|
else case $val in
|
|
[Yy][Ee][Ss])
|
|
echo "Yes"
|
|
;;
|
|
[Nn][Oo])
|
|
echo ""
|
|
;;
|
|
*)
|
|
startup_error "Invalid value ($val) for $1"
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Determine the value for a parameter that defaults to No
|
|
#
|
|
added_param_value_no() # $1 = Parameter Name, $2 = Parameter value
|
|
{
|
|
local val="$2"
|
|
|
|
if [ -z "$val" ]; then
|
|
echo ""
|
|
else case $val in
|
|
[Yy][Ee][Ss])
|
|
echo "Yes"
|
|
;;
|
|
[Nn][Oo])
|
|
echo ""
|
|
;;
|
|
*)
|
|
startup_error "Invalid value ($val) for $1"
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Initialize this program
|
|
#
|
|
do_initialize() {
|
|
|
|
# Run all utility programs using the C locale
|
|
#
|
|
# Thanks to Vincent Planchenault for this tip #
|
|
|
|
export LC_ALL=C
|
|
|
|
# Make sure umask is sane
|
|
umask 077
|
|
|
|
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
|
|
#
|
|
# Establish termination function
|
|
#
|
|
TERMINATOR=startup_error
|
|
#
|
|
# Clear all configuration variables
|
|
#
|
|
VERSION=
|
|
IPTABLES=
|
|
FW=
|
|
SUBSYSLOCK=
|
|
ALLOWRELATED=Yes
|
|
LOGRATE=
|
|
LOGBURST=
|
|
LOGPARMS=
|
|
LOGLIMIT=
|
|
ADD_IP_ALIASES=
|
|
ADD_SNAT_ALIASES=
|
|
TC_ENABLED=
|
|
BLACKLIST_DISPOSITION=
|
|
BLACKLIST_LOGLEVEL=
|
|
CLAMPMSS=
|
|
ROUTE_FILTER=
|
|
LOG_MARTIANS=
|
|
DETECT_DNAT_IPADDRS=
|
|
MUTEX_TIMEOUT=
|
|
FORWARDPING=
|
|
MACLIST_DISPOSITION=
|
|
MACLIST_LOG_LEVEL=
|
|
TCP_FLAGS_DISPOSITION=
|
|
TCP_FLAGS_LOG_LEVEL=
|
|
RFC1918_LOG_LEVEL=
|
|
MARK_IN_FORWARD_CHAIN=
|
|
SHARED_DIR=/usr/share/shorewall
|
|
FUNCTIONS=
|
|
VERSION_FILE=
|
|
LOGFORMAT=
|
|
LOGRULENUMBERS=
|
|
ADMINISABSENTMINDED=
|
|
BLACKLISTNEWONLY=
|
|
MODULE_SUFFIX=
|
|
ACTIONS=
|
|
USEDACTIONS=
|
|
SMURF_LOG_LEVEL=
|
|
DISABLE_IPV6=
|
|
BRIDGING=
|
|
DYNAMIC_ZONES=
|
|
PKTTYPE=
|
|
USEPKTYPE=
|
|
RETAIN_ALIASES=
|
|
DELAYBLACKLISTLOAD=
|
|
LOGTAGONLY=
|
|
LOGALLNEW=
|
|
RFC1918_STRICT=
|
|
MACLIST_TTL=
|
|
SAVE_IPSETS=
|
|
RESTOREFILE=
|
|
MAPOLDACTIONS=
|
|
IMPLICIT_CONTINUE=
|
|
|
|
RESTOREBASE=
|
|
TMP_DIR=
|
|
ALL_INTERFACES=
|
|
ROUTEMARK_INTERFACES=
|
|
IPSECMARK=256
|
|
PROVIDERS=
|
|
CRITICALHOSTS=
|
|
IPSECFILE=
|
|
EXCLUSION_SEQ=1
|
|
STOPPING=
|
|
HAVE_MUTEX=
|
|
ALIASES_TO_ADD=
|
|
SECTION=ESTABLISHED
|
|
SECTIONS=
|
|
ALL_PORTS=
|
|
|
|
FUNCTIONS=$SHARED_DIR/functions
|
|
|
|
if [ -f $FUNCTIONS ]; then
|
|
[ $VERBOSE -gt 1 ] && echo "Loading $FUNCTIONS..."
|
|
. $FUNCTIONS
|
|
else
|
|
startup_error "$FUNCTIONS does not exist!"
|
|
fi
|
|
|
|
TMP_DIR=$(mktempdir)
|
|
|
|
[ -n "$TMP_DIR" ] && chmod 700 $TMP_DIR || \
|
|
startup_error "Can't create a temporary directory"
|
|
|
|
trap "[ -n "$RESTOREBASE" ] && rm -f $RESTOREBASE;rm -rf $TMP_DIR; my_mutex_off; exit 2" 1 2 3 4 5 6 9
|
|
|
|
ensure_config_path
|
|
|
|
VERSION_FILE=$SHARED_DIR/version
|
|
|
|
[ -f $VERSION_FILE ] && VERSION=$(cat $VERSION_FILE)
|
|
|
|
run_user_exit params
|
|
|
|
config=$(find_file shorewall.conf)
|
|
|
|
if [ -f $config ]; then
|
|
if [ -r $config ]; then
|
|
progress_message "Processing $config..."
|
|
. $config
|
|
else
|
|
startup_error "Cannot read $config (Hint: Are you root?)"
|
|
fi
|
|
else
|
|
startup_error "$config does not exist!"
|
|
fi
|
|
#
|
|
# Restore CONFIG_PATH if the shorewall.conf file cleared it
|
|
#
|
|
ensure_config_path
|
|
#
|
|
# Determine the capabilities of the installed iptables/netfilter
|
|
# We load the kernel modules here to accurately determine
|
|
# capabilities when module autoloading isn't enabled.
|
|
#
|
|
PKTTYPE=$(added_param_value_no PKTTYPE $PKTTYPE)
|
|
|
|
[ -n "${MODULE_SUFFIX:=o gz ko o.gz ko.gz}" ]
|
|
if [ -z "$EXPORT" ]; then
|
|
|
|
load_kernel_modules
|
|
|
|
if [ -z "$IPTABLES" ]; then
|
|
IPTABLES=$(mywhich iptables 2> /dev/null)
|
|
|
|
[ -z "$IPTABLES" ] && startup_error "Can't find iptables executable"
|
|
else
|
|
[ -e "$IPTABLES" ] || startup_error "\$IPTABLES=$IPTABLES does not exist or is not executable"
|
|
fi
|
|
determine_capabilities
|
|
|
|
[ -d /var/lib/shorewall ] || mkdir -p /var/lib/shorewall
|
|
|
|
else
|
|
f=$(find_file capabilities)
|
|
|
|
[ -f $f ] && . $f || startup_error "The -e flag requires a capabilities file"
|
|
fi
|
|
|
|
ALLOWRELATED="$(added_param_value_yes ALLOWRELATED $ALLOWRELATED)"
|
|
[ -n "$ALLOWRELATED" ] || \
|
|
startup_error "ALLOWRELATED=No is not supported"
|
|
ADD_IP_ALIASES="$(added_param_value_yes ADD_IP_ALIASES $ADD_IP_ALIASES)"
|
|
|
|
if [ -n "${LOGRATE}${LOGBURST}" ]; then
|
|
LOGLIMIT="--match limit"
|
|
[ -n "$LOGRATE" ] && LOGLIMIT="$LOGLIMIT --limit $LOGRATE"
|
|
[ -n "$LOGBURST" ] && LOGLIMIT="$LOGLIMIT --limit-burst $LOGBURST"
|
|
fi
|
|
|
|
if [ -n "$IP_FORWARDING" ]; then
|
|
case "$IP_FORWARDING" in
|
|
[Oo][Nn]|[Oo][Ff][Ff]|[Kk][Ee][Ee][Pp])
|
|
;;
|
|
*)
|
|
startup_error "Invalid value ($IP_FORWARDING) for IP_FORWARDING"
|
|
;;
|
|
esac
|
|
else
|
|
IP_FORWARDING=On
|
|
fi
|
|
|
|
[ -n "${BLACKLIST_DISPOSITION:=DROP}" ]
|
|
|
|
case "$CLAMPMSS" in
|
|
[0-9]*)
|
|
;;
|
|
*)
|
|
CLAMPMSS=$(added_param_value_no CLAMPMSS $CLAMPMSS)
|
|
;;
|
|
esac
|
|
|
|
ADD_SNAT_ALIASES=$(added_param_value_no ADD_SNAT_ALIASES $ADD_SNAT_ALIASES)
|
|
ROUTE_FILTER=$(added_param_value_no ROUTE_FILTER $ROUTE_FILTER)
|
|
LOG_MARTIANS=$(added_param_value_no LOG_MARTIANS $LOG_MARTIANS)
|
|
DETECT_DNAT_IPADDRS=$(added_param_value_no DETECT_DNAT_IPADDRS $DETECT_DNAT_IPADDRS)
|
|
FORWARDPING=$(added_param_value_no FORWARDPING $FORWARDPING)
|
|
[ -n "$FORWARDPING" ] && \
|
|
startup_error "FORWARDPING=Yes is no longer supported"
|
|
|
|
maclist_target=reject
|
|
|
|
if [ -n "$MACLIST_DISPOSITION" ] ; then
|
|
case $MACLIST_DISPOSITION in
|
|
REJECT)
|
|
;;
|
|
DROP)
|
|
maclist_target=DROP
|
|
;;
|
|
ACCEPT)
|
|
maclist_target=RETURN
|
|
;;
|
|
*)
|
|
startup_error "Invalid value ($MACLIST_DISPOSITION) for MACLIST_DISPOSITION"
|
|
;;
|
|
esac
|
|
else
|
|
MACLIST_DISPOSITION=REJECT
|
|
fi
|
|
|
|
if [ -n "$TCP_FLAGS_DISPOSITION" ] ; then
|
|
case $TCP_FLAGS_DISPOSITION in
|
|
REJECT|ACCEPT|DROP)
|
|
;;
|
|
*)
|
|
startup_error "Invalid value ($TCP_FLAGS_DISPOSITION) for TCP_FLAGS_DISPOSITION"
|
|
;;
|
|
esac
|
|
else
|
|
TCP_FLAGS_DISPOSITION=DROP
|
|
fi
|
|
|
|
[ -n "${RFC1918_LOG_LEVEL:=info}" ]
|
|
|
|
MARK_IN_FORWARD_CHAIN=$(added_param_value_no MARK_IN_FORWARD_CHAIN $MARK_IN_FORWARD_CHAIN)
|
|
[ -n "$MARK_IN_FORWARD_CHAIN" ] && MARKING_CHAIN=tcfor || MARKING_CHAIN=tcpre
|
|
CLEAR_TC=$(added_param_value_yes CLEAR_TC $CLEAR_TC)
|
|
|
|
if [ -n "$LOGFORMAT" ]; then
|
|
if [ -n "$(echo $LOGFORMAT | grep '%d')" ]; then
|
|
LOGRULENUMBERS=Yes
|
|
temp=$(printf "$LOGFORMAT" fooxx 1 barxx 2> /dev/null)
|
|
if [ $? -ne 0 ]; then
|
|
startup_error "Invalid LOGFORMAT string: \"$LOGFORMAT\""
|
|
fi
|
|
else
|
|
temp=$(printf "$LOGFORMAT" fooxx barxx 2> /dev/null)
|
|
if [ $? -ne 0 ]; then
|
|
startup_error "Invalid LOGFORMAT string: \"$LOGFORMAT\""
|
|
fi
|
|
fi
|
|
|
|
[ ${#temp} -le 29 ] || startup_error "LOGFORMAT string is longer than 29 characters: \"$LOGFORMAT\""
|
|
else
|
|
LOGFORMAT="Shorewall:%s:%s:"
|
|
fi
|
|
ADMINISABSENTMINDED=$(added_param_value_no ADMINISABSENTMINDED $ADMINISABSENTMINDED)
|
|
BLACKLISTNEWONLY=$(added_param_value_no BLACKLISTNEWONLY $BLACKLISTNEWONLY)
|
|
DISABLE_IPV6=$(added_param_value_no DISABLE_IPV6 $DISABLE_IPV6)
|
|
BRIDGING=$(added_param_value_no BRIDGING $BRIDGING)
|
|
DYNAMIC_ZONES=$(added_param_value_no DYNAMIC_ZONES $DYNAMIC_ZONES)
|
|
STARTUP_ENABLED=$(added_param_value_yes STARTUP_ENABLED $STARTUP_ENABLED)
|
|
RETAIN_ALIASES=$(added_param_value_no RETAIN_ALIASES $RETAIN_ALIASES)
|
|
[ -n "${ADD_IP_ALIASES}${ADD_SNAT_ALIASES}" ] || RETAIN_ALIASES=
|
|
DELAYBLACKLISTLOAD=$(added_param_value_no DELAYBLACKLISTLOAD $DELAYBLACKLISTLOAD)
|
|
LOGTAGONLY=$(added_param_value_no LOGTAGONLY $LOGTAGONLY)
|
|
RFC1918_STRICT=$(added_param_value_no RFC1918_STRICT $RFC1918_STRICT)
|
|
SAVE_IPSETS=$(added_param_value_no SAVE_IPSETS $SAVE_IPSETS)
|
|
MAPOLDACTIONS=$(added_param_value_yes MAPOLDACTIONS $MAPOLDACTIONS)
|
|
FASTACCEPT=$(added_param_value_no FASTACCEPT $FASTACCEPT)
|
|
IMPLICIT_CONTINUE=$(added_param_value_no IMPLICIT_CONTINUE $IMPLICIT_CONTINUE)
|
|
|
|
case ${IPSECFILE:=ipsec} in
|
|
ipsec|zones)
|
|
;;
|
|
*)
|
|
startup_error "Invalid value ($IPSECFILE) for IPSECFILE option"
|
|
;;
|
|
esac
|
|
|
|
case ${MACLIST_TABLE:=filter} in
|
|
filter)
|
|
;;
|
|
mangle)
|
|
[ $MACLIST_DISPOSITION = reject ] && startup_error "MACLIST_DISPOSITION=REJECT is not allowed with MACLIST_TABLE=mangle"
|
|
;; *)
|
|
startup_error "Invalid value ($MACLIST_TABLE) for MACLIST_TABLE option"
|
|
;;
|
|
esac
|
|
|
|
TC_SCRIPT=
|
|
|
|
if [ -n "$TC_ENABLED" ] ; then
|
|
case "$TC_ENABLED" in
|
|
[Yy][Ee][Ss])
|
|
TC_ENABLED=
|
|
TC_SCRIPT=$(find_file tcstart)
|
|
[ -f $TC_SCRIPT ] || startup_error "Unable to find tcstart file"
|
|
;;
|
|
[Ii][Nn][Tt][Ee][Rr][Nn][Aa][Ll])
|
|
TC_ENABLED=Yes
|
|
;;
|
|
[Nn][Oo])
|
|
TC_ENABLED=
|
|
;;
|
|
esac
|
|
else
|
|
TC_ENABLED=Yes
|
|
fi
|
|
|
|
if [ -n "$TC_ENABLED" ];then
|
|
[ -n "$MANGLE_ENABLED" ] || startup_error "Traffic Shaping requires mangle support in your kernel and iptables"
|
|
fi
|
|
|
|
[ "x${SHOREWALL_DIR}" = "x." ] && SHOREWALL_DIR="$PWD"
|
|
|
|
#
|
|
# Strip the files that we use often
|
|
#
|
|
strip_file interfaces
|
|
strip_file hosts
|
|
#
|
|
# Check out the user's shell
|
|
#
|
|
[ -n "${SHOREWALL_SHELL:=/bin/sh}" ]
|
|
|
|
temp=$(decodeaddr 192.168.1.1)
|
|
if [ $(encodeaddr $temp) != 192.168.1.1 ]; then
|
|
startup_error "Shell $SHOREWALL_SHELL is broken and may not be used with Shorewall"
|
|
fi
|
|
|
|
if [ -z "$KLUDGEFREE" ]; then
|
|
rm -f $TMP_DIR/physdev
|
|
rm -f $TMP_DIR/iprange
|
|
fi
|
|
|
|
}
|
|
|
|
#
|
|
# Give Usage Information
|
|
#
|
|
usage() {
|
|
echo "Usage: $0 [debug] {start|stop|reset|restart|refresh|clear}"
|
|
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"
|
|
#
|
|
[ $# -gt 1 ] && [ "$1" = "debug" ] && { set -x ; shift ; }
|
|
|
|
NOLOCK=
|
|
|
|
[ $# -gt 1 ] && [ "$1" = "nolock" ] && { NOLOCK=Yes; shift ; }
|
|
|
|
trap "my_mutex_off; exit 2" 1 2 3 4 5 6 9
|
|
|
|
COMMAND="$1"
|
|
|
|
case "$COMMAND" in
|
|
stop)
|
|
[ $# -ne 1 ] && usage
|
|
do_initialize
|
|
my_mutex_on
|
|
#
|
|
# Don't want to do a 'stop' when startup is disabled
|
|
#
|
|
check_disabled_startup
|
|
progress_message3 "Stopping Shorewall..."
|
|
stop_firewall
|
|
[ -n "$SUBSYSLOCK" ] && rm -f $SUBSYSLOCK
|
|
progress_message3 "done."
|
|
my_mutex_off
|
|
;;
|
|
|
|
reset)
|
|
[ $# -ne 1 ] && usage
|
|
do_initialize
|
|
my_mutex_on
|
|
if ! shorewall_is_started ; then
|
|
echo "Shorewall Not Started"
|
|
[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
|
|
my_mutex_off
|
|
exit 2;
|
|
fi
|
|
$IPTABLES -Z
|
|
$IPTABLES -t nat -Z
|
|
$IPTABLES -t mangle -Z
|
|
report "Shorewall Counters Reset"
|
|
date > /var/lib/shorewall/restarted
|
|
my_mutex_off
|
|
;;
|
|
|
|
refresh)
|
|
[ $# -ne 1 ] && usage
|
|
do_initialize
|
|
my_mutex_on
|
|
if ! shorewall_is_started ; then
|
|
echo "Shorewall Not Started" >&2
|
|
[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
|
|
my_mutex_off
|
|
exit 2;
|
|
fi
|
|
refresh_firewall;
|
|
my_mutex_off
|
|
;;
|
|
|
|
clear)
|
|
[ $# -ne 1 ] && usage
|
|
do_initialize
|
|
my_mutex_on
|
|
progress_message3 "Clearing Shorewall..."
|
|
clear_firewall
|
|
[ -n "$SUBSYSLOCK" ] && rm -f $SUBSYSLOCK
|
|
progress_message3 "done."
|
|
my_mutex_off
|
|
;;
|
|
|
|
add)
|
|
[ $# -lt 3 ] && usage
|
|
do_initialize
|
|
my_mutex_on
|
|
if ! shorewall_is_started ; then
|
|
echo "Shorewall Not Started"
|
|
[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
|
|
my_mutex_off
|
|
exit 2;
|
|
fi
|
|
shift
|
|
add_to_zone $@
|
|
my_mutex_off
|
|
;;
|
|
|
|
delete)
|
|
[ $# -lt 3 ] && usage
|
|
do_initialize
|
|
my_mutex_on
|
|
if ! shorewall_is_started ; then
|
|
echo "Shorewall Not Started"
|
|
[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
|
|
my_mutex_off
|
|
exit 2;
|
|
fi
|
|
shift
|
|
delete_from_zone $@
|
|
my_mutex_off
|
|
;;
|
|
|
|
call)
|
|
#
|
|
# Undocumented way to call functions in /usr/share/shorewall/firewall directly
|
|
#
|
|
shift
|
|
do_initialize
|
|
EMPTY=
|
|
$@
|
|
;;
|
|
|
|
*)
|
|
usage
|
|
;;
|
|
|
|
esac
|