mirror of
https://gitlab.com/shorewall/code.git
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ca9c02ce7f
Avoid superfluous jumps to the policy chain with CONTINUE. Add reserved networks to rfc1918. Implement MULTIPORT option for multiport match support. git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@50 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
633 lines
16 KiB
Bash
Executable File
633 lines
16 KiB
Bash
Executable File
#!/bin/sh
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#
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# Shorewall Packet Filtering Firewall Control Program - V1.3 - 6/14/2002
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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 - Tom Eastep (teastep@shorewall.net)
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#
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#
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# This file should be placed in /sbin/shorewall.
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#
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# Shorewall documentation is available at http://shorewall.sourceforge.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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# The firewall uses configuration files in /etc/shorewall/ - skeleton
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# files is included with the firewall.
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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 monitor [ refresh-interval ] Repeatedly Displays firewall status
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# plus the last 20 "interesting"
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# packets
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# shorewall status Displays firewall status
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# shorewall reset Resets iptables packet and
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# byte counts
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# shorewall clear Open the floodgates by
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# removing all iptables rules
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# and setting the three permanent
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# chain policies to ACCEPT
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# shorewall refresh Rebuild the common chain to
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# compensate for a change of
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# broadcast address on any "detect"
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# interface.
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# shorewall show <chain> Display the rules in a <chain>
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# shorewall show log Print the last 20 log messages
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# shorewall show connections Show the kernel's connection
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# tracking table
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# shorewall show nat Display the rules in the nat table
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# shorewall show {mangle|tos} Display the rules in the mangle table
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# shorewall show tc Display traffic control info
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# shorewall version Display the installed version id
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# shorewall check Verify the more heavily-used
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# configuration files.
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# shorewall try <directory> [ <timeout> ] Try a new configuration and if
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# it doesn't work, revert to the
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# standard one. If a timeout is supplied
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# the command reverts back to the
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# standard configuration after that many
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# seconds have elapsed after successfully
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# starting the new configuration.
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#
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# Display a chain if it exists
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#
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showfirstchain() # $1 = name of chain
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{
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awk \
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'BEGIN {prnt=0; rslt=1; }; \
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/^$/ { next; };\
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/^Chain/ {if ( prnt == 1 ) { rslt=0; exit 0; }; };\
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/Chain '$1'/ { prnt=1; }; \
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{ if (prnt == 1) print; };\
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END { exit rslt; }' /tmp/chains-$$
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}
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showchain() # $1 = name of chain
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{
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if [ "$firstchain" = "Yes" ]; then
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if showfirstchain $1; then
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firstchain=
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fi
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else
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awk \
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'BEGIN {prnt=0;};\
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/^$|^ pkts/ { next; };\
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/^Chain/ {if ( prnt == 1 ) exit; };\
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/Chain '$1'/ { prnt=1; };\
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{ if (prnt == 1) print; }' /tmp/chains-$$
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fi
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}
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#################################################################################
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# Set the configuration variables from shorewall.conf #
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#################################################################################
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get_config() {
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get_statedir
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[ -z "$LOGFILE" ] && LOGFILE=/var/log/messages
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if [ ! -f $LOGFILE ]; then
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echo "LOGFILE ($LOGFILE) does not exist!" >&2
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exit 2
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fi
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#
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# See if we have a real version of "tail" -- use separate redirection so
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# that ash (aka /bin/sh on LRP) doesn't crap
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#
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if ( tail -n5 $LOGFILE > /dev/null 2> /dev/null ) ; then
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realtail="Yes"
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else
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realtail=""
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fi
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[ -n "$FW" ] || FW=fw
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}
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#################################################################################
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# Display IPTABLES rules -- we used to store them in a variable but ash #
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# dies when trying to display large sets of rules #
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#################################################################################
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display_chains()
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{
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trap "rm -f /tmp/chains-$$; exit 1" 1 2 3 4 5 6 9
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if [ "$haveawk" = "Yes" ]; then
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#
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# Send the output to a temporary file since ash craps if we try to store
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# the output in a variable.
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#
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iptables -L -n -v > /tmp/chains-$$
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clear
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echo -e "$banner `date`\\n"
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echo -e "Standard Chains\\n"
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firstchain="Yes"
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showchain INPUT
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showchain OUTPUT
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showchain FORWARD
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timed_read
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clear
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echo -e "$banner `date`\\n"
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firstchain=Yes
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echo -e "Input Chains\\n"
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chains=`grep '^Chain.*_[in|fwd]' /tmp/chains-$$ | cut -d' ' -f 2`
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for chain in $chains; do
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showchain $chain
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done
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timed_read
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for zone in $zones; do
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if [ -n "`grep "^Chain \.*${zone}" /tmp/chains-$$`" ] ; then
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clear
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echo -e "$banner `date`\\n"
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firstchain=Yes
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eval display=\$${zone}_display
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echo -e "$display Chains\\n"
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for zone1 in $FW $zones; do
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showchain ${zone}2$zone1
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showchain @${zone}2$zone1
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[ "$zone" != "$zone1" ] && \
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showchain ${zone1}2${zone} && \
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showchain @${zone1}2${zone}
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done
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timed_read
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fi
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done
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clear
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echo -e "$banner `date`\\n"
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firstchain=Yes
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echo -e "Policy Chains\\n"
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showchain common
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showchain badpkt
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showchain icmpdef
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showchain rfc1918
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showchain blacklst
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showchain reject
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for zone in $zones all; do
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showchain ${zone}2all
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showchain @${zone}2all
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[ "$zone" = "all" ] || { showchain all2${zone}; showchain @all2${zone}; }
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done
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timed_read
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qt rm -f /tmp/chains-$$
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else
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iptables -L -n -v
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timed_read
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fi
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trap - 1 2 3 4 5 6 9
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}
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#################################################################################
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# Delay $timeout seconds -- if we're running on a recent bash2 then allow #
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# <enter> to terminate the delay #
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#################################################################################
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timed_read ()
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{
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read -t $timeout foo 2> /dev/null
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test $? -eq 2 && sleep $timeout
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}
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#################################################################################
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# Display the last $1 packets logged #
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#################################################################################
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packet_log() # $1 = number of messages
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{
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local options
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[ -n "$realtail" ] && options="-n$1"
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grep 'Shorewall:\|ipt_unclean' $LOGFILE | \
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sed s/" $host kernel: Shorewall:"/" "/ | \
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sed s/" $host kernel: ipt_unclean: "/" "/ | \
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sed 's/MAC=.*SRC=/SRC=/' | \
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tail $options
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}
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#################################################################################
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# Show traffic control information #
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#################################################################################
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show_tc() {
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show_one_tc() {
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local device=${1%@*}
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qdisc=`tc qdisc list dev $device`
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if [ -n "$qdisc" ]; then
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echo Device $device:
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tc -s -d qdisc show dev $device
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tc -s -d class show dev $device
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echo
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fi
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}
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ip link list | \
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while read inx interface details; do
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case $inx in
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[0-9]*)
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show_one_tc ${interface%:}
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;;
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*)
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;;
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esac
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done
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}
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#################################################################################
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# Monitor the Firewall #
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#################################################################################
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monitor_firewall() # $1 = timeout -- if negative, prompt each time that
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# an 'interesting' packet count changes
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{
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get_config
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host=`echo $HOSTNAME | sed 's/\..*$//'`
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oldrejects=`iptables -L -v -n | grep 'LOG'`
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if [ $1 -lt 0 ]; then
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let "timeout=- $1"
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pause="Yes"
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else
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pause="No"
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timeout=$1
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fi
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qt which awk && { haveawk=Yes; determine_zones; } || haveawk=
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while true; do
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display_chains
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clear
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echo -e "$banner `date`\\n"
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echo -e "Dropped/Rejected Packet Log\\n"
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rejects=`iptables -L -v -n | grep 'LOG'`
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if [ "$rejects" != "$oldrejects" ]; then
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oldrejects="$rejects"
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echo -e '\a'
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packet_log 20
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if [ "$pause" = "Yes" ]; then
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echo -en '\nEnter any character to continue: '
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read foo
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else
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timed_read
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fi
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else
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echo
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packet_log 20
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timed_read
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fi
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clear
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echo -e "$banner `date`\\n"
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echo -e "NAT Status\\n"
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iptables -t nat -L -n -v
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echo -e "\\nTOS/MARK Status\\n"
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iptables -t mangle -L -n -v
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timed_read
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clear
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echo -e "$banner `date`\\n"
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echo -e "\\nTracked Connections\\n"
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cat /proc/net/ip_conntrack
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timed_read
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clear
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echo -e "$banner `date`\\n"
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echo -e "\\nTraffic Shaping/Control\\n"
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show_tc
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timed_read
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done
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}
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#################################################################################
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# Watch the Firewall Log #
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#################################################################################
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logwatch() # $1 = timeout -- if negative, prompt each time that
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# an 'interesting' packet count changes
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{
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get_config
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host=`echo $HOSTNAME | sed 's/\..*$//'`
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oldrejects=`iptables -L -v -n | grep 'LOG'`
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if [ $1 -lt 0 ]; then
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timeout=$((- $1))
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pause="Yes"
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else
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pause="No"
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timeout=$1
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fi
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qt which awk && haveawk=Yes || haveawk=
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while true; do
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clear
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echo -e "$banner `date`\\n"
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echo -e "Dropped/Rejected Packet Log\\n"
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rejects=`iptables -L -v -n | grep 'LOG'`
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if [ "$rejects" != "$oldrejects" ]; then
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oldrejects="$rejects"
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echo -e '\a'
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packet_log 40
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if [ "$pause" = "Yes" ]; then
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echo -en '\nEnter any character to continue: '
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read foo
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else
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timed_read
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fi
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else
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echo
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packet_log 40
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timed_read
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fi
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done
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}
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#################################################################################
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# Give Usage Information #
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#################################################################################
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usage() # $1 = exit status
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{
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echo "Usage: `basename $0` [debug] [nolock] [-c <directory>] <command>"
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echo "where <command> is one of:"
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echo " show [<chain>|connections|log|nat|tc|tos]"
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echo " start"
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echo " stop"
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echo " reset"
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echo " restart"
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echo " status"
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echo " clear"
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echo " refresh"
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echo " hits"
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echo " monitor [<refresh interval>]"
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echo " version"
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echo " check"
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echo " try <directory> [ <timeout> ]"
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echo " logwatch [<refresh interval>]"
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exit $1
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}
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#################################################################################
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# Execution begins here #
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#################################################################################
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debugging=
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if [ $# -gt 0 ] && [ "$1" = "debug" ]; then
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debugging=debug
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shift
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fi
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nolock=
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if [ $# -gt 0 ] && [ "$1" = "nolock" ]; then
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nolock=nolock
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shift
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fi
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SHOREWALL_DIR=
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done=0
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while [ $done -eq 0 ]; do
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[ $# -eq 0 ] && usage 1
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case $1 in
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-c)
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[ $# -eq 1 ] && usage 1
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if [ ! -d $2 ]; then
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if [ -e $2 ]; then
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echo "$2 is not a directory" >&2 && exit 2
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else
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echo "Directory $2 does not exist" >&2 && exit 2
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fi
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fi
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SHOREWALL_DIR=$2
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shift
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shift
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;;
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*)
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done=1
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;;
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esac
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done
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if [ $# -eq 0 ] || [ $# -gt 3 ]; then
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usage 1
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fi
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functions=/etc/shorewall/functions
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if [ -n "$SHOREWALL_DIR" ]; then
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export SHOREWALL_DIR
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[ -f $SHOREWALL_DIR/functions ] && functions=$SHOREWALL_DIR/functions
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fi
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if [ -f $functions ]; then
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. $functions
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else
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echo "/etc/shorewall/functions does not exist!" >&2
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exit 2
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fi
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firewall=`find_file firewall`
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if [ ! -f $firewall ]; then
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echo "ERROR: Shorewall is not properly installed"
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if [ -L $firewall ]; then
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echo " $firewall is a symbolic link to a"
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echo " non-existant file"
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else
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echo " The file /etc/shorewall/firewall does not exist"
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fi
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exit 2
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fi
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PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
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version_file=`find_file version`
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if [ -f $version_file ]; then
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version=`cat $version_file`
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else
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echo "ERROR: Shoreline Firewall is not properly installed"
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echo " The file /etc/shorewall/version does not exist"
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exit 1
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fi
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banner="Shorewall-$version Status at $HOSTNAME -"
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case "$1" in
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start|stop|restart|reset|clear|refresh|check)
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[ $# -ne 1 ] && usage 1
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exec $firewall $debugging $nolock $1
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;;
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show)
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[ $# -gt 2 ] && usage 1
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case "$2" in
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connections)
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echo -e "Shorewall-$version Connections at $HOSTNAME - `date`\\n"
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cat /proc/net/ip_conntrack
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;;
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nat)
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echo -e "Shorewall-$version NAT at $HOSTNAME - `date`\\n"
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iptables -t nat -L -n -v
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;;
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tos|mangle)
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echo -e "Shorewall-$version TOS at $HOSTNAME - `date`\\n"
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iptables -t mangle -L -n -v
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;;
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log)
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get_config
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echo -e "Shorewall-$version Log at $HOSTNAME - `date`\\n"
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host=`echo $HOSTNAME | sed 's/\..*$//'`
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packet_log 20
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;;
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tc)
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echo -e "Shorewall-$version Traffic Control at $HOSTNAME - `date`\\n"
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show_tc
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;;
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*)
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echo -e "Shorewall-$version Chain $2 at $HOSTNAME - `date`\\n"
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iptables -L $2 -n -v
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;;
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esac
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;;
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monitor)
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if [ $# -eq 2 ]; then
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monitor_firewall $2
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elif [ $# -eq 1 ]; then
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monitor_firewall 30
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else
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usage 1
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fi
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;;
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status)
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[ $# -eq 1 ] || usage 1
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get_config
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clear
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echo -e "Shorewall-$version Status at $HOSTNAME - `date`\\n"
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host=`echo $HOSTNAME | sed 's/\..*$//'`
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iptables -L -n -v
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echo
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packet_log
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echo
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iptables -t nat -L -n -v
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echo
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iptables -t mangle -L -n -v
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echo
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cat /proc/net/ip_conntrack
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;;
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hits)
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[ $# -eq 1 ] || usage 1
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get_config
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clear
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echo -e "Shorewall-$version Hits at $HOSTNAME - `date`\\n"
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timeout=30
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if [ `grep -c "Shorewall:" $LOGFILE ` -gt 0 ] ; then
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echo " HITS IP DATE"
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grep "Shorewall:" $LOGFILE | sed 's/\(.\{6\}\)\(.*SRC=\)\(.*\)\( DST=.*\)/\3 \1/' | sort | uniq -c | sort -rn
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echo ""
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echo " HITS IP"
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grep "Shorewall:" $LOGFILE | sed 's/\(.*SRC=\)\(.* \)\(DST=.*\)/\2/' | sort | uniq -c | sort -rn
|
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echo ""
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|
|
|
echo " HITS DATE"
|
|
grep "Shorewall:" $LOGFILE | sed 's/\(.\{6\}\)\(.*\)/\1/' | sort | uniq -c | sort -rn
|
|
echo ""
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|
|
|
echo " HITS PORT SERVICE(S)"
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|
grep 'Shorewall:.*DPT' $LOGFILE | sed 's/\(.*DPT=\)\([0-9]\{1,5\}\)\(.*\)/\2/' | sort | uniq -c | sort -rn | \
|
|
while read count port ; do
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# List all services defined for the given port
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|
srv=`grep "\\b$port/" /etc/services | cut -f 1 | sort -u`
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|
srv=`echo $srv | sed 's/ /,/g'`
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|
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if [ -n "$srv" ] ; then
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|
printf '%7d %5d %s\n' $count $port $srv
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|
else
|
|
printf '%7d %5d\n' $count $port
|
|
fi
|
|
done
|
|
fi
|
|
;;
|
|
version)
|
|
echo $version
|
|
;;
|
|
try)
|
|
[ -n "$SHOREWALL_DIR" ] && startup_error "Error: -c option may not be used with \"try\""
|
|
[ $# -lt 2 -o $# -gt 3 ] && usage 1
|
|
$0 -c $2 restart
|
|
if ! iptables -L shorewall > /dev/null 2> /dev/null; then
|
|
$0 start
|
|
elif [ $# -eq 3 ]; then
|
|
sleep $3
|
|
$0 restart
|
|
fi
|
|
;;
|
|
logwatch)
|
|
if [ $# -eq 2 ]; then
|
|
logwatch $2
|
|
elif [ $# -eq 1 ]; then
|
|
logwatch 30
|
|
else
|
|
usage 1
|
|
fi
|
|
;;
|
|
*)
|
|
usage 1
|
|
;;
|
|
esac
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