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#!/bin/sh
#
# Shorewall Packet Filtering Firewall Control Program - V3.2
#
# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
#
# (c) 1999,2000,2001,2002,2003,2004,2005,2006 - Tom Eastep (teastep@shorewall.net)
#
# This file should be placed in /sbin/shorewall.
#
# Shorewall documentation is available at http://shorewall.sourceforge.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of Version 2 of the GNU General Public License
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
#
# If an error occurs while starting or restarting the firewall, the
# firewall is automatically stopped.
#
# The firewall uses configuration files in /etc/shorewall/ - skeleton
# files is included with the firewall.
#
# Commands are:
#
# shorewall add <iface>[:<host>] zone Adds a host or subnet to a zone
# shorewall delete <iface>[:<host>] zone Deletes a host or subnet from a zone
# shorewall dump Dumps all Shorewall-related information
# for problem analysis
# shorewall start Starts the firewall
# shorewall restart Restarts the firewall
# shorewall stop Stops the firewall
# shorewall status Displays firewall status
# shorewall reset Resets iptables packet and
# byte counts
# shorewall clear Open the floodgates by
# removing all iptables rules
# and setting the three permanent
# chain policies to ACCEPT
# shorewall refresh Rebuild the common chain to
# compensate for a change of
# broadcast address on any "detect"
# interface.
# shorewall [re]load [ <directory> ] <system>
# Compile a script and install it on a
# remote Shorewall Lite system.
# shorewall show <chain> [ <chain> ... ] Display the rules in each <chain> listed
# shorewall show actions Displays the available actions
# shorewall show log Print the last 20 log messages
# shorewall show connections Show the kernel's connection
# tracking table
# shorewall show nat Display the rules in the nat table
# shorewall show {mangle|tos} Display the rules in the mangle table
# shorewall show tc Display traffic control info
# shorewall show classifiers Display classifiers
# shorewall show capabilities Display iptables/kernel capabilities
# shorewall version Display the installed version id
# shorewall check Verify the more heavily-used
# configuration files.
# shorewall try <directory> [ <timeout> ] Try a new configuration and if
# it doesn't work, revert to the
# standard one. If a timeout is supplied
# the command reverts back to the
# standard configuration after that many
# seconds have elapsed after successfully
# starting the new configuration.
# shorewall logwatch [ refresh-interval ] Monitor the local log for Shorewall
# messages.
# shorewall drop <address> ... Temporarily drop all packets from the
# listed address(es)
# shorewall reject <address> ... Temporarily reject all packets from the
# listed address(es)
# shorewall allow <address> ... Reenable address(es) previously
# disabled with "drop" or "reject"
# shorewall save [ <file> ] Save the list of "rejected" and
# "dropped" addresses so that it will
# be automatically reinstated the
# next time that Shorewall starts.
# Save the current state so that 'shorewall
# restore' can be used.
#
# shorewall forget [ <file> ] Discard the data saved by 'shorewall save'
#
# shorewall restore [ <file> ] Restore the state of the firewall from
# previously saved information.
#
# shorewall ipaddr { <address>/<cidr> | <address> <netmask> }
#
# Displays information about the network
# defined by the argument[s]
#
# shorewall iprange <address>-<address> Decomposes a range of IP addresses into
# a list of network/host addresses.
#
# shorewall ipdecimal { <address> | <integer> }
#
# Displays the decimal equivalent of an IP
# address and vice versa.
#
# shorewall safe-start Starts the firewall and promtp for a c
# confirmation to accept or reject the new
# configuration
#
# shorewall safe-restart Restarts the firewall and prompt for a
# confirmation to accept or reject the new
# configuration
#
# shorewall compile [ -e ] [ <directory> ] <filename>
# Compile a firewall program file.
#
# Fatal Error
#
fatal_error() # $@ = Message
{
echo " $@" >&2
exit 2
}
# Display a chain if it exists
#
showfirstchain() # $1 = name of chain
{
awk \
'BEGIN {prnt=0; rslt=1; }; \
/^$/ { next; };\
/^Chain/ {if ( prnt == 1 ) { rslt=0; exit 0; }; };\
/Chain '$1'/ { prnt=1; }; \
{ if (prnt == 1) print; };\
END { exit rslt; }' $TMPFILE
}
showchain() # $1 = name of chain
{
if [ "$firstchain" = "Yes" ]; then
if showfirstchain $1; then
firstchain=
fi
else
awk \
'BEGIN {prnt=0;};\
/^$|^ pkts/ { next; };\
/^Chain/ {if ( prnt == 1 ) exit; };\
/Chain '$1'/ { prnt=1; };\
{ if (prnt == 1) print; }' $TMPFILE
fi
}
#
# The 'awk' hack that compensates for bugs in iptables-save (or rather in the extension modules).
#
iptablesbug()
{
if qt mywhich awk ; then
awk 'BEGIN { sline=""; };\
/^-j/ { print sline $0; next };\
/-m policy.*-j/ { print $0; next };\
/-m policy/ { sline=$0; next };\
/--mask ff/ { sub( /--mask ff/, "--mask 0xff" ) };\
{ print ; sline="" }'
else
echo " WARNING: You don't have 'awk' on this system so the output of the save command may be unusable" >&2
cat
fi
}
#
# Validate the value of RESTOREFILE
#
validate_restorefile() # $* = label
{
case $RESTOREFILE in
*/*)
error_message "ERROR: $@ must specify a simple file name: $RESTOREFILE"
exit 2
;;
.*)
error_message "ERROR: Reserved File Name: $RESTOREFILE"
exit 2
;;
esac
}
#
# Set the configuration variables from shorewall.conf
#
get_config() {
if [ -z "$EXPORT" -a "$(whoami)" = root ]; then
#
# This block is avoided for compile for export and when the user isn't root
#
# We don't export CONFIG_PATH so that CONFIG_PATH will be picked up fresh by the compiler
# from /usr/share/shorewall/configpath.
#
export CONFIG_PATH
[ -z "$LOGFILE" ] && LOGFILE=/var/log/messages
if [ ! -f $LOGFILE ]; then
echo "LOGFILE ($LOGFILE) does not exist!" >&2
exit 2
fi
if [ -n "$IPTABLES" ]; then
if [ ! -e "$IPTABLES" ]; then
echo " ERROR: The program specified in IPTABLES does not exist or is not executable" >&2
exit 2
fi
else
IPTABLES=$(mywhich iptables 2> /dev/null)
if [ -z "$IPTABLES" ] ; then
echo " ERROR: Can't find iptables executable" >&2
exit 2
fi
fi
export IPTABLES
#
# See if we have a real version of "tail" -- use separate redirection so
# that ash (aka /bin/sh on LRP) doesn't crap
#
if ( tail -n5 $LOGFILE > /dev/null 2> /dev/null ) ; then
realtail="Yes"
else
realtail=""
fi
#
# Compile by non-root needs no restore file
#
[ -n "$RESTOREFILE" ] || RESTOREFILE=restore
validate_restorefile RESTOREFILE
export RESTOREFILE
case $STARTUP_ENABLED in
No|no|NO)
echo " WARNING: Shorewall startup is disabled. To enable startup, set STARTUP_ENABLED=Yes in ${CONFDIR}/shorewall.conf" >&2
STARTUP_ENABLED=
;;
Yes|yes|YES)
;;
*)
if [ -n "$STARTUP_ENABLED" ]; then
echo " ERROR: Invalid Value for STARTUP_ENABLE: $STARTUP_ENABLED" >&2
exit 2
fi
;;
esac
case ${TC_ENABLED:=Internal} in
No|NO|no)
TC_ENABLED=
;;
esac
[ -n "LOGFORMAT" ] && LOGFORMAT="${LOGFORMAT%%%*}"
[ -n "$LOGFORMAT" ] || LOGFORMAT="Shorewall:"
export LOGFORMAT
fi
if [ -n "$SHOREWALL_SHELL" ]; then
if [ ! -e "$SHOREWALL_SHELL" ]; then
echo " ERROR: The program specified in SHOREWALL_SHELL does not exist or is not executable" >&2
exit 2
fi
fi
[ -n "${VERBOSITY:=2}" ]
VERBOSE=$(($VERBOSE_OFFSET + $VERBOSITY))
export VERBOSE
}
#
# Clear descriptor 1 if it is a terminal
#
clear_term() {
[ -t 1 ] && clear
}
#
# Delay $timeout seconds -- if we're running on a recent bash2 then allow
# <enter> to terminate the delay
#
timed_read ()
{
read -t $timeout foo 2> /dev/null
test $? -eq 2 && sleep $timeout
}
#
# Display the last $1 packets logged
#
packet_log() # $1 = number of messages
{
local options
[ -n "$realtail" ] && options="-n$1"
if [ -n "$SHOWMACS" -o $VERBOSE -gt 2 ]; then
grep "${LOGFORMAT}" $LOGFILE | \
sed s/" kernel:"// | \
sed s/" $host $LOGFORMAT"/" "/ | \
tail $options
else
grep "${LOGFORMAT}" $LOGFILE | \
sed s/" kernel:"// | \
sed s/" $host $LOGFORMAT"/" "/ | \
sed 's/MAC=.* SRC=/SRC=/' | \
tail $options
fi
}
#
# Show traffic control information
#
show_tc() {
show_one_tc() {
local device=${1%@*}
qdisc=$(tc qdisc list dev $device)
if [ -n "$qdisc" ]; then
echo Device $device:
tc -s -d qdisc show dev $device
tc -s -d class show dev $device
echo
fi
}
ip link list | \
while read inx interface details; do
case $inx in
[0-9]*)
show_one_tc ${interface%:}
;;
*)
;;
esac
done
}
#
# Show classifier information
#
show_classifiers() {
show_one_classifier() {
local device=${1%@*}
qdisc=$(tc qdisc list dev $device)
if [ -n "$qdisc" ]; then
echo Device $device:
tc -s filter ls dev $device
echo
fi
}
ip link list | \
while read inx interface details; do
case $inx in
[0-9]*)
show_one_classifier ${interface%:}
;;
*)
;;
esac
done
}
#
# Watch the Firewall Log
#
logwatch() # $1 = timeout -- if negative, prompt each time that
# an 'interesting' packet count changes
{
host=$(echo $HOSTNAME | sed 's/\..*$//')
oldrejects=$($IPTABLES -L -v -n | grep 'LOG')
if [ $1 -lt 0 ]; then
timeout=$((- $1))
pause="Yes"
else
pause="No"
timeout=$1
fi
qt mywhich awk && haveawk=Yes || haveawk=
while true; do
clear_term
echo "$banner $(date)"
echo
echo "Dropped/Rejected Packet Log"
echo
show_reset
rejects=$($IPTABLES -L -v -n | grep 'LOG')
if [ "$rejects" != "$oldrejects" ]; then
oldrejects="$rejects"
$RING_BELL
packet_log 40
if [ "$pause" = "Yes" ]; then
echo
echo $ECHO_N 'Enter any character to continue: '
read foo
else
timed_read
fi
else
echo
packet_log 40
timed_read
fi
done
}
#
# Save currently running configuration
#
save_config() {
if shorewall_is_started ; then
[ -d ${VARDIR} ] || mkdir -p ${VARDIR}
if [ -f $RESTOREPATH -a ! -x $RESTOREPATH ]; then
echo " ERROR: $RESTOREPATH exists and is not a saved Shorewall configuration"
else
case $RESTOREFILE in
save|restore-base)
echo " ERROR: Reserved file name: $RESTOREFILE"
;;
*)
if $IPTABLES -L dynamic -n > ${VARDIR}/save; then
echo " Dynamic Rules Saved"
if [ -f ${VARDIR}/.restore ]; then
if iptables-save | iptablesbug > ${VARDIR}/restore-$$; then
cp -f ${VARDIR}/.restore $RESTOREPATH
mv -f ${VARDIR}/restore-$$ ${RESTOREPATH}-iptables
chmod +x $RESTOREPATH
echo " Currently-running Configuration Saved to $RESTOREPATH"
rm -f ${RESTOREPATH}-ipsets
case ${SAVE_IPSETS:-No} in
[Yy][Ee][Ss])
RESTOREPATH=${RESTOREPATH}-ipsets
f=${VARDIR}/restore-$$
echo "#!/bin/sh" > $f
echo "#This ipset restore file generated $(date) by Shorewall $version" >> $f
echo >> $f
echo ". ${SHAREDIR}/functions" >> $f
echo >> $f
grep '^MODULE' ${VARDIR}/restore-base >> $f
echo "reload_kernel_modules << __EOF__" >> $f
grep 'loadmodule ip_set' ${VARDIR}/restore-base >> $f
echo "__EOF__" >> $f
echo >> $f
echo "ipset -U :all: :all:" >> $f
echo "ipset -F" >> $f
echo "ipset -X" >> $f
echo "ipset -R << __EOF__" >> $f
ipset -S >> $f
echo "__EOF__" >> $f
mv -f $f $RESTOREPATH
chmod +x $RESTOREPATH
echo " Current Ipset Contents Saved to $RESTOREPATH"
;;
[Nn][Oo])
;;
*)
echo " WARNING: Invalid value ($SAVE_IPSETS) for SAVE_IPSETS. Ipset contents not saved"
;;
esac
else
rm -f ${VARDIR}/restore-$$
echo " ERROR: Currently-running Configuration Not Saved"
fi
else
echo " ERROR: ${VARDIR}/.restore does not exist"
fi
else
echo "Error Saving the Dynamic Rules"
fi
;;
esac
fi
else
echo "Shorewall isn't started"
fi
}
#
# Start Command Executor
#
start_command() {
local finished=0
do_it() {
[ -n "$nolock" ] || mutex_on
progress_message3 "Compiling..."
if $SHOREWALL_SHELL ${SHAREDIR}/compiler $debugging $nolock compile ${VARDIR}/.start; then
${VARDIR}/.start $debugging start
fi
[ -n "$nolock" ] || mutex_off
}
if shorewall_is_started; then
error_message "Shorewall is already running"
exit 1
fi
if [ -z "$STARTUP_ENABLED" ]; then
error_message "ERROR: Startup is disabled"
exit 2
fi
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
f*)
FAST=Yes
option=${option#f}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
case $# in
0)
;;
1)
[ -n "$SHOREWALL_DIR" -o -n "$FAST" ] && usage 2
if [ ! -d $1 ]; then
if [ -e $1 ]; then
echo "$1 is not a directory" >&2 && exit 2
else
echo "Directory $1 does not exist" >&2 && exit 2
fi
fi
SHOREWALL_DIR=$
export SHOREWALL_DIR
;;
*)
usage 1
;;
esac
export NOROUTES
if [ -n "$FAST" ]; then
if qt mywhich make; then
#
# RESTOREFILE is exported by get_config()
#
make -qf ${CONFDIR}/Makefile || FAST=
fi
if [ -n "$FAST" ]; then
RESTOREPATH=${VARDIR}/$RESTOREFILE
if [ -x $RESTOREPATH ]; then
if [ -x ${RESTOREPATH}-ipsets ]; then
echo Restoring Ipsets...
#
# We must purge iptables to be sure that there are no
# references to ipsets
#
iptables -F
iptables -X
$SHOREWALL_SHELL ${RESTOREPATH}-ipsets
fi
echo Restoring Shorewall...
$SHOREWALL_SHELL $RESTOREPATH restore
date > ${VARDIR}/restarted
progress_message3 Shorewall restored from $RESTOREPATH
else
do_it
fi
else
do_it
fi
else
do_it
fi
}
#
# Compile Command Executor
#
compile_command() {
local finished=0
while [ $finished -eq 0 ]; do
[ $# -eq 0 ] && usage 1
option=$1
case $option in
-*)
shift
option=${option#-}
[ -z "$option" ] && usage 1
while [ -n "$option" ]; do
case $option in
e*)
EXPORT=Yes
option=${option#e}
;;
-)
finished=1
option=
;;
*)
usage 1
;;
esac
done
;;
*)
finished=1
;;
esac
done
file=
case $# in
1)
file=$1
;;
2)
[ -n "$SHOREWALL_DIR" ] && usage 2
if [ ! -d $1 ]; then
if [ -e $1 ]; then
echo "$1 is not a directory" >&2 && exit 2
else
echo "Directory $1 does not exist" >&2 && exit 2
fi
fi
SHOREWALL_DIR=$1
export SHOREWALL_DIR
file=$2
;;
*)
usage 1
;;
esac
export EXPORT
progress_message3 "Compiling..."
exec $SHOREWALL_SHELL ${SHAREDIR}/compiler $debugging compile $file
}
#
# Check Command Executor
#
check_command() {
local finished=0
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
e*)
EXPORT=Yes
option=${option#e}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
case $# in
0)
;;
1)
[ -n "$SHOREWALL_DIR" ] && usage 2
if [ ! -d $1 ]; then
if [ -e $1 ]; then
echo "$1 is not a directory" >&2 && exit 2
else
echo "Directory $1 does not exist" >&2 && exit 2
fi
fi
SHOREWALL_DIR=$1
export SHOREWALL_DIR
;;
*)
usage 1
;;
esac
export EXPORT
progress_message3 "Checking..."
exec $SHOREWALL_SHELL ${SHAREDIR}/compiler $debugging $nolock check
}
#
# Restart Command Executor
#
restart_command() {
local finished=0
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
n*)
NOROUTES=Yes
option=${option#n}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
case $# in
0)
;;
1)
[ -n "$SHOREWALL_DIR" ] && usage 2
if [ ! -d $1 ]; then
if [ -e $1 ]; then
echo "$1 is not a directory" >&2 && exit 2
else
echo "Directory $1 does not exist" >&2 && exit 2
fi
fi
SHOREWALL_DIR=$1
export SHOREWALL_DIR
;;
*)
usage 1
;;
esac
if [ -z "$STARTUP_ENABLED" ]; then
error_message "ERROR: Startup is disabled"
exit 2
fi
export NOROUTES
[ -n "$nolock" ] || mutex_on
progress_message3 "Compiling..."
if $SHOREWALL_SHELL ${SHAREDIR}/compiler $debugging $nolock compile ${VARDIR}/.restart; then
$SHOREWALL_SHELL ${VARDIR}/.restart $debugging restart
fi
[ -n "$nolock" ] || mutex_off
}
#
# Show Command Executor
#
show_command() {
local finished=0
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
v*)
VERBOSE=$(($VERBOSE + 1 ))
option=${option#v}
;;
x*)
IPT_OPTIONS="-xnv"
option=${option#x}
;;
m*)
SHOWMACS=Yes
option=${option#m}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
[ -n "$debugging" ] && set -x
case "$1" in
connections)
[ $# -gt 1 ] && usage 1
echo "Shorewall-$version Connections at $HOSTNAME - $(date)"
echo
cat /proc/net/ip_conntrack
;;
nat)
[ $# -gt 1 ] && usage 1
echo "Shorewall-$version NAT Table at $HOSTNAME - $(date)"
echo
show_reset
$IPTABLES -t nat -L $IPT_OPTIONS
;;
tos|mangle)
[ $# -gt 1 ] && usage 1
echo "Shorewall-$version Mangle Table at $HOSTNAME - $(date)"
echo
show_reset
$IPTABLES -t mangle -L $IPT_OPTIONS
;;
log)
[ $# -gt 1 ] && usage 1
echo "Shorewall-$version Log at $HOSTNAME - $(date)"
echo
show_reset
host=$(echo $HOSTNAME | sed 's/\..*$//')
packet_log 20
;;
tc)
[ $# -gt 1 ] && usage 1
echo "Shorewall-$version Traffic Control at $HOSTNAME - $(date)"
echo
show_tc
;;
classifiers)
[ $# -gt 1 ] && usage 1
echo "Shorewall-$version Clasifiers at $HOSTNAME - $(date)"
echo
show_classifiers
;;
zones)
[ $# -gt 1 ] && usage 1
if [ -f ${VARDIR}/zones ]; then
echo "Shorewall-$version Zones at $HOSTNAME - $(date)"
echo
while read zone type hosts; do
echo "$zone ($type)"
for host in $hosts; do
echo " $host"
done
done < ${VARDIR}/zones
echo
else
echo " ERROR: ${VARDIR}/zones does not exist" >&2
exit 1
fi
;;
capabilities)
[ $# -gt 1 ] && usage 1
determine_capabilities
VERBOSE=2
report_capabilities
;;
actions)
[ $# -gt 1 ] && usage 1
echo "allowBcast # Silently Allow Broadcast/multicast"
echo "dropBcast # Silently Drop Broadcast/multicast"
echo "dropNotSyn # Silently Drop Non-syn TCP packets"
echo "rejNotSyn # Silently Reject Non-syn TCP packets"
echo "dropInvalid # Silently Drop packets that are in the INVALID conntrack state"
echo "allowInvalid # Accept packets that are in the INVALID conntrack state."
echo "allowoutUPnP # Allow traffic from local command 'upnpd'"
echo "allowinUPnP # Allow UPnP inbound (to firewall) traffic"
echo "forwardUPnP # Allow traffic that upnpd has redirected from"
cat ${SHAREDIR}/actions.std ${CONFDIR}/actions | grep -Ev '^\#|^$'
;;
macros)
[ $# -gt 1 ] && usage 1
for macro in ${SHAREDIR}/macro.*; do
foo=`grep 'This macro' $macro | head -n 1`
if [ -n "$foo" ]; then
macro=${macro#*.}
foo=${foo%.*}
echo " $macro ${foo#\#}" | sed 's/This macro //'
fi
done
;;
config)
. ${SHAREDIR}/configpath
echo "Default CONFIG_PATH is $CONFIG_PATH"
echo "LITEDIR is $LITEDIR"
;;
*)
echo "Shorewall-$version $([ $# -gt 0 ] && echo Chains || echo Chain) $* at $HOSTNAME - $(date)"
echo
show_reset
if [ $# -gt 0 ]; then
for chain in $*; do
$IPTABLES -L $chain $IPT_OPTIONS
done
else
$IPTABLES -L $IPT_OPTIONS
fi
;;
esac
}
#
# Dump Command Executor
#
dump_command() {
local finished=0
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
x*)
IPT_OPTIONS="-xnv"
option=${option#x}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
[ -n "$debugging" ] && set -x
[ $# -eq 0 ] || usage 1
clear_term
echo "Shorewall-$version Dump at $HOSTNAME - $(date)"
echo
show_reset
host=$(echo $HOSTNAME | sed 's/\..*$//')
$IPTABLES -L $IPT_OPTIONS
heading "Log ($LOGFILE)"
packet_log 20
heading "NAT Table"
$IPTABLES -t nat -L $IPT_OPTIONS
heading "Mangle Table"
$IPTABLES -t mangle -L $IPT_OPTIONS
heading "Conntrack Table"
cat /proc/net/ip_conntrack
heading "IP Configuration"
ip addr ls
heading "IP Stats"
ip -stat link ls
if qt mywhich brctl; then
heading "Bridges"
brctl show
fi
heading "/proc"
show_proc /proc/version
show_proc /proc/sys/net/ipv4/ip_forward
show_proc /proc/sys/net/ipv4/icmp_echo_ignore_all
for directory in /proc/sys/net/ipv4/conf/*; do
for file in proxy_arp arp_filter arp_ignore rp_filter log_martians; do
show_proc $directory/$file
done
done
if [ -n "$(ip rule ls)" ]; then
heading "Routing Rules"
ip rule ls
ip rule ls | while read rule; do
echo ${rule##* }
done | sort -u | while read table; do
heading "Table $table:"
ip route ls table $table
done
else
heading "Routing Table"
ip route ls
fi
heading "ARP"
arp -na
if qt mywhich lsmod; then
heading "Modules"
lsmod | grep -E '^ip_|^ipt_|^iptable_'
fi
determine_capabilities
echo
report_capabilities
if [ -n "$TC_ENABLED" ]; then
heading "Traffic Control"
show_tc
heading "TC Filters"
show_classifiers
fi
}
#
# Safe-start/safe-restart Command Executor
#
safe_commands() {
local finished=0
# test is the shell supports timed read
read -t 0 junk 2> /dev/null
if [ $? -eq 2 -a ! -x /bin/bash ];then
echo "Your shell does not support a feature required to execute this command".
exit 2
fi
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
n*)
NOROUTES=Yes
option=${option#n}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
[ $# -eq 0 ] || usage 2
if [ -z "$STARTUP_ENABLED" ]; then
error_message "ERROR: Startup is disabled"
exit 2
fi
mutex_on
if shorewall_is_started; then
running=Yes
else
running=
fi
if [ "$COMMAND" = "safe-start" -a -n "$running" ]; then
# the command is safe-start but the firewall is already running
error_message "Shorewall is already started"
mutex_off
exit 1
fi
if [ "$COMMAND" = "safe-start" -o -z "$running" ]; then
# the command is safe-start or shorewall is not started yet
command="start"
else
# the command is safe-restart and the firewall is already running
command="restart"
fi
progress_message3 "Compiling..."
if ! $SHOREWALL_SHELL ${SHAREDIR}/compiler $debugging nolock compile ${VARDIR}/.$command; then
status=$?
mutex_off
exit $status
fi
RESTOREFILE=.safe
RESTOREPATH=${VARDIR}/.safe
save_config
case $command in
start)
progress_message3 "Starting..."
;;
restart)
progress_message3 "Restarting..."
;;
esac
${VARDIR}/.$command $command
echo -n "Do you want to accept the new firewall configuration? [y/n] "
if read_yesno_with_timeout; then
echo "New configuration has been accepted"
else
if [ "$command" = "restart" ]; then
${VARDIR}/.safe restore
else
${VARDIR}/.$command clear
fi
mutex_off
echo "New configuration has been rejected and the old one restored"
exit 2
fi
mutex_off
[ $? -eq 0 ] && [ -n "$SUBSYSLOCK" ] && touch $SUBSYSLOCK
}
#
# Restore Comand Executor
#
restore_command() {
local finished=0
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
n*)
NOROUTES=Yes
option=${option#n}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
case $# in
0)
;;
1)
RESTOREFILE="$1"
validate_restorefile '<restore file>'
;;
*)
usage 1
;;
esac
if [ -z "$STARTUP_ENABLED" ]; then
error_message "ERROR: Startup is disabled"
exit 2
fi
RESTOREPATH=${VARDIR}/$RESTOREFILE
export NOROUTES
[ -n "$nolock" ] || mutex_on
if [ -x $RESTOREPATH ]; then
if [ -x ${RESTOREPATH}-ipsets ] ; then
echo Restoring Ipsets...
iptables -F
iptables -X
$SHOREWALL_SHELL ${RESTOREPATH}-ipsets
fi
progress_message3 "Restoring Shorewall..."
$SHOREWALL_SHELL $RESTOREPATH restore && progress_message3 "Shorewall restored from ${VARDIR}/$RESTOREFILE"
[ -n "$nolock" ] || mutex_off
else
echo "File ${VARDIR}/$RESTOREFILE: file not found"
[ -n "$nolock" ] || mutex_off
exit 2
fi
}
#
# [Re]load command executor
#
reload_command()
{
local verbose=$(make_verbose)
if shorewall $debugging $verbose compile -e $1 $1/firewall && \
echo "Copying ${1}/firewall to ${2}:${LITEDIR}..." && \
scp $1/firewall root@${2}:${LITEDIR}
then
echo "Copy complete"
if [ $COMMAND = reload ]; then
ssh root@${2} "/sbin/shorewall-lite $debugging $verbose restart" && \
progress_message3 "System $2 reloaded"
else
ssh root@${2} "/sbin/shorewall-lite $debugging $verbose restart" && \
progress_message3 "System $2 reloaded"
fi
fi
}
#
# Help information
#
help()
{
[ -x $HELP ] && { export version; exec $HELP $*; }
echo "Help subsystem is not installed at $HELP"
}
#
# Give Usage Information
#
usage() # $1 = exit status
{
echo "Usage: $(basename $0) [debug|trace] [nolock] [ -q ] [ -v ] [ -t ] <command>"
echo "where <command> is one of:"
echo " add <interface>[:<host-list>] ... <zone>"
echo " allow <address> ..."
echo " check [ -e ] [ <directory> ]"
echo " clear"
echo " compile [ -e ] [ <directory name> ] <path name>"
echo " delete <interface>[:<host-list>] ... <zone>"
echo " drop <address> ..."
echo " dump [ -x ]"
echo " forget [ <file name> ]"
echo " help [ <command > | host | address ]"
echo " hits"
echo " ipcalc { <address>/<vlsm> | <address> <netmask> }"
echo " ipdecimal { <address> | <integer> }"
echo " iprange <address>-<address>"
echo " load [ <directory> ] <system>"
echo " logdrop <address> ..."
echo " logreject <address> ..."
echo " logwatch [<refresh interval>]"
echo " refresh"
echo " reject <address> ..."
echo " reload [ <directory> ] <system>"
echo " reset"
echo " restart [ -n ] [ <directory> ]"
echo " restore [ -n ] [ <file name> ]"
echo " save [ <file name> ]"
echo " show [ -x ] [ -m ] [<chain> [ <chain> ... ]|actions|capabilities|classifiers|config|connections|log|macros|mangle|nat|tc|zones]"
echo " start [ -f ] [ -n ] [ <directory> ]"
echo " stop"
echo " status"
echo " try <directory> [ <timeout> ]"
echo " version"
echo " safe-start"
echo " safe-restart"
echo
exit $1
}
#
# Display the time that the counters were last reset
#
show_reset() {
[ -f ${VARDIR}/restarted ] && \
echo "Counters reset $(cat ${VARDIR}/restarted)" && \
echo
}
#
# Display's the passed file name followed by "=" and the file's contents.
#
show_proc() # $1 = name of a file
{
[ -f $1 ] && echo " $1 = $(cat $1)"
}
read_yesno_with_timeout() {
read -t 60 yn 2> /dev/null
if [ $? -eq 2 ]
then
# read doesn't support timeout
test -x /bin/bash || return 2 # bash is not installed so the feature is not available
/bin/bash -c 'read -t 60 yn ; if [ "$yn" == "y" ] ; then exit 0 ; else exit 1 ; fi' # invoke bash and use its version of read
return $?
else
# read supports timeout
case "$yn" in
y|Y)
return 0
;;
*)
return 1
;;
esac
fi
}
#
# Print a heading with leading and trailing black lines
#
heading() {
echo
echo "$@"
echo
}
#
# Create the appropriate -q option to pass onward
#
make_verbose() {
local v=$VERBOSE_OFFSET option=-
if [ $VERBOSE_OFFSET -gt 0 ]; then
while [ $v -gt 0 ]; do
option="${option}v"
v=$(($v - 1))
done
echo $option
elif [ $VERBOSE_OFFSET -lt 0 ]; then
while [ $v -lt 0 ]; do
option="${option}q"
v=$(($v + 1))
done
echo $option
fi
}
#
# Execution begins here
#
debugging=
if [ $# -gt 0 ] && [ "$1" = "debug" -o "$1" = "trace" ]; then
debugging=debug
shift
fi
nolock=
if [ $# -gt 0 ] && [ "$1" = "nolock" ]; then
nolock=nolock
shift
fi
SHOREWALL_DIR=
IPT_OPTIONS="-nv"
FAST=
VERBOSE_OFFSET=0
NOROUTES=
EXPORT=
export TIMESTAMP=
noroutes=
finished=0
while [ $finished -eq 0 ]; do
[ $# -eq 0 ] && usage 1
option=$1
case $option in
-)
finished=1
;;
-*)
option=${option#-}
[ -z "$option" ] && usage 1
while [ -n "$option" ]; do
case $option in
c)
[ $# -eq 1 ] && usage 1
if [ ! -d $2 ]; then
if [ -e $2 ]; then
echo "$2 is not a directory" >&2 && exit 2
else
echo "Directory $2 does not exist" >&2 && exit 2
fi
fi
SHOREWALL_DIR=$2
option=
shift
;;
e*)
EXPORT=Yes
option=${option#e}
;;
x*)
IPT_OPTIONS="-xnv"
option=${option#x}
;;
q*)
VERBOSE_OFFSET=$(($VERBOSE_OFFSET - 1 ))
option=${option#q}
;;
f*)
FAST=Yes
option=${option#f}
;;
v*)
VERBOSE_OFFSET=$(($VERBOSE_OFFSET + 1 ))
option=${option#v}
;;
n*)
NOROUTES=Yes
option=${option#n}
;;
t*)
TIMESTAMP=Yes
option=${option#t}
;;
-)
finished=1
option=
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
if [ $# -eq 0 ]; then
usage 1
fi
[ -n "$SHOREWALL_DIR" ] && export SHOREWALL_DIR
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
MUTEX_TIMEOUT=
SHAREDIR=/usr/share/shorewall
VARDIR=/var/lib/shorewall
CONFDIR=/etc/shorewall
export PRODUCT="Shorewall"
FIREWALL=$SHAREDIR/firewall
FUNCTIONS=$SHAREDIR/functions
VERSION_FILE=$SHAREDIR/version
HELP=$SHAREDIR/help
if [ -f $FUNCTIONS ]; then
. $FUNCTIONS
else
echo "$FUNCTIONS does not exist!" >&2
exit 2
fi
ensure_config_path
config=$(find_file shorewall.conf)
if [ -f $config ]; then
if [ -r $config ]; then
. $config
else
echo "Cannot read $config! (Hint: Are you root?)" >&2
exit 1
fi
else
echo "$config does not exist!" >&2
exit 2
fi
ensure_config_path
get_config
if [ ! -f $FIREWALL ]; then
echo " ERROR: Shorewall is not properly installed" >&2
if [ -L $FIREWALL ]; then
echo " $FIREWALL is a symbolic link to a" >&2
echo " non-existant file" >&2
else
echo " The file $FIREWALL does not exist" >&2
fi
exit 2
fi
if [ -f $VERSION_FILE ]; then
version=$(cat $VERSION_FILE)
else
echo " ERROR: Shorewall is not properly installed" >&2
echo " The file $VERSION_FILE does not exist" >&2
exit 1
fi
banner="Shorewall-$version Status at $HOSTNAME -"
case $(echo -e) in
-e*)
RING_BELL="echo \a"
;;
*)
RING_BELL="echo -e \a"
;;
esac
case $(echo -n "Testing") in
-n*)
ECHO_N=
;;
*)
ECHO_N=-n
;;
esac
COMMAND=$1
case "$COMMAND" in
start)
shift
start_command $@
;;
stop|reset|clear|refresh)
[ $# -ne 1 ] && usage 1
export NOROUTES
exec $SHOREWALL_SHELL $FIREWALL $debugging $nolock $COMMAND
;;
compile)
shift
compile_command $@
;;
restart)
shift
restart_command $@
;;
check)
shift
check_command $@
;;
add|delete)
[ $# -lt 3 ] && usage 1
exec $SHOREWALL_SHELL $FIREWALL $debugging $nolock $@
;;
show|list)
shift
show_command $@
;;
load|reload)
shift
case $# in
1)
directory="."
system=$1
;;
2)
directory=$1
system=$2
;;
*)
usage 1
;;
esac
reload_command $directory $system
;;
status)
[ $# -eq 1 ] || usage 1
echo "Shorewall-$version Status at $HOSTNAME - $(date)"
echo
if shorewall_is_started ; then
echo "Shorewall is running"
status=0
else
echo "Shorewall is stopped"
status=4
fi
if [ -f ${VARDIR}/state ]; then
state="$(cat ${VARDIR}/state)"
case $state in
Stopped*|Clear*)
status=3
;;
esac
else
state=Unknown
fi
echo "State:$state"
echo
exit $status
;;
dump)
shift
dump_command $@
;;
hits)
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] || usage 1
clear_term
echo "Shorewall-$version Hits at $HOSTNAME - $(date)"
echo
timeout=30
if [ $(grep -c "$LOGFORMAT" $LOGFILE ) -gt 0 ] ; then
echo " HITS IP DATE"
echo " ---- --------------- ------"
grep "$LOGFORMAT" $LOGFILE | sed 's/\(.\{6\}\)\(.*SRC=\)\(.*\)\( DST=.*\)/\3 \1/' | sort | uniq -c | sort -rn
echo ""
echo " HITS IP PORT"
echo " ---- --------------- -----"
grep "$LOGFORMAT" $LOGFILE | sed 's/\(.*SRC=\)\(.*\)\( DST=.*DPT=\)\([0-9]\{1,5\}\)\(.*\)/\2 \4/
t
s/\(.*SRC=\)\(.*\)\( DST=.*\)/\2/' | sort | uniq -c | sort -rn
echo ""
echo " HITS DATE"
echo " ---- ------"
grep "$LOGFORMAT" $LOGFILE | sed 's/\(.\{6\}\)\(.*\)/\1/' | sort | uniq -c | sort -rn
echo ""
echo " HITS PORT SERVICE(S)"
echo " ---- ----- ----------"
grep "$LOGFORMAT.*DPT" $LOGFILE | sed 's/\(.*DPT=\)\([0-9]\{1,5\}\)\(.*\)/\2/' | sort | uniq -c | sort -rn | \
while read count port ; do
# List all services defined for the given port
srv=$(grep "^[^#].*\\b$port/" /etc/services | cut -f 1 | sort -u)
srv=$(echo $srv | sed 's/ /,/g')
if [ -n "$srv" ] ; then
printf '%7d %5d %s\n' $count $port $srv
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 $# -gt 3 ] && usage 1
VERBOSE=$(make_verbose)
[ -n "$NOROUTES" ] && NOROUTES=-n
if ! $0 $debugging $VERBOSE -c $2 restart; then
if ! $IPTABLES -L shorewall > /dev/null 2> /dev/null; then
$0 $VERBOSE $NOROUTES start
fi
elif ! $IPTABLES -L shorewall > /dev/null 2> /dev/null; then
$0 $VERBOSE $NOROUTES start
elif [ $# -eq 3 ]; then
sleep $3
$0 $VERBOSE $NOROUTES restart
fi
;;
logwatch)
shift
finished=0
while [ $finished -eq 0 -a $# -ne 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
[ -z "$option" ] && usage 1
while [ -n "$option" ]; do
case $option in
v*)
VERBOSE=$(($VERBOSE + 1 ))
option=${option#v}
;;
q*)
VERBOSE=$(($VERBOSE - 1 ))
option=${option#q}
;;
m*)
SHOWMACS=Yes
option=${option#m}
;;
-)
finished=1
option=
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
[ -n "$debugging" ] && set -x
if [ $# -eq 1 ]; then
logwatch $1
elif [ $# -eq 0 ]; then
logwatch 30
else
usage 1
fi
;;
drop)
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] && usage 1
if shorewall_is_started ; then
mutex_on
while [ $# -gt 1 ]; do
shift
qt $IPTABLES -D dynamic -s $1 -j reject
qt $IPTABLES -D dynamic -s $1 -j DROP
qt $IPTABLES -D dynamic -s $1 -j logreject
qt $IPTABLES -D dynamic -s $1 -j logdrop
$IPTABLES -A dynamic -s $1 -j DROP || break 1
echo "$1 Dropped"
done
mutex_off
else
error_message "ERROR: Shorewall is not started"
exit 2
fi
;;
logdrop)
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] && usage 1
if shorewall_is_started ; then
mutex_on
while [ $# -gt 1 ]; do
shift
qt $IPTABLES -D dynamic -s $1 -j reject
qt $IPTABLES -D dynamic -s $1 -j DROP
qt $IPTABLES -D dynamic -s $1 -j logreject
qt $IPTABLES -D dynamic -s $1 -j logdrop
$IPTABLES -A dynamic -s $1 -j logdrop || break 1
echo "$1 Dropped"
done
mutex_off
else
error_message "ERROR: Shorewall is not started"
exit 2
fi
;;
reject|logreject)
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] && usage 1
if shorewall_is_started ; then
mutex_on
while [ $# -gt 1 ]; do
shift
qt $IPTABLES -D dynamic -s $1 -j reject
qt $IPTABLES -D dynamic -s $1 -j DROP
qt $IPTABLES -D dynamic -s $1 -j logreject
qt $IPTABLES -D dynamic -s $1 -j logdrop
$IPTABLES -A dynamic -s $1 -j $COMMAND || break 1
echo "$1 Rejected"
done
mutex_off
else
error_message "ERROR: Shorewall is not started"
exit 2
fi
;;
allow)
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] && usage 1
if shorewall_is_started ; then
mutex_on
while [ $# -gt 1 ]; do
shift
if qt $IPTABLES -D dynamic -s $1 -j reject ||\
qt $IPTABLES -D dynamic -s $1 -j DROP ||\
qt $IPTABLES -D dynamic -s $1 -j logdrop ||\
qt $IPTABLES -D dynamic -s $1 -j logreject
then
echo "$1 Allowed"
else
echo "$1 Not Dropped or Rejected"
fi
done
mutex_off
else
error_message "ERROR: Shorewall is not started"
exit 2
fi
;;
save)
[ -n "$debugging" ] && set -x
case $# in
1)
;;
2)
RESTOREFILE="$2"
validate_restorefile '<restore file>'
;;
*)
usage 1
;;
esac
RESTOREPATH=${VARDIR}/$RESTOREFILE
[ "$nolock" ] || mutex_on
save_config
[ "$nolock" ] || mutex_off
;;
forget)
case $# in
1)
;;
2)
RESTOREFILE="$2"
validate_restorefile '<restore file>'
;;
*)
usage 1
;;
esac
RESTOREPATH=${VARDIR}/$RESTOREFILE
if [ -x $RESTOREPATH ]; then
if [ -x ${RESTOREPATH}-ipsets ]; then
rm -f ${RESTOREPATH}-ipsets
echo " ${RESTOREPATH}-ipsets removed"
fi
rm -f $RESTOREPATH
rm -f ${RESTOREPATH}-iptables
echo " $RESTOREPATH removed"
elif [ -f $RESTOREPATH ]; then
echo " $RESTOREPATH exists and is not a saved Shorewall configuration"
fi
rm -f ${VARDIR}/save
;;
ipcalc)
[ -n "$debugging" ] && set -x
if [ $# -eq 2 ]; then
address=${2%/*}
vlsm=${2#*/}
elif [ $# -eq 3 ]; then
address=$2
vlsm=$(ip_vlsm $3)
else
usage 1
fi
[ -z "$vlsm" ] && exit 2
[ "x$address" = "x$vlsm" ] && usage 2
[ $vlsm -gt 32 ] && echo "Invalid VLSM: /$vlsm" >&2 && exit 2
address=$address/$vlsm
echo " CIDR=$address"
temp=$(ip_netmask $address); echo " NETMASK=$(encodeaddr $temp)"
temp=$(ip_network $address); echo " NETWORK=$temp"
temp=$(broadcastaddress $address); echo " BROADCAST=$temp"
;;
iprange)
[ -n "$debugging" ] && set -x
case $2 in
*.*.*.*-*.*.*.*)
ip_range $2
;;
*)
usage 1
;;
esac
;;
ipdecimal)
[ -n "$debugging" ] && set -x
case $2 in
*.*.*.*)
echo " $(decodeaddr $2)"
;;
*)
echo " $(encodeaddr $2)"
;;
esac
;;
restore)
shift
restore_command $@
;;
call)
[ -n "$debugging" ] && set -x
#
# Undocumented way to call functions in ${SHAREDIR}/functions directly
#
shift
$@
;;
help)
shift
[ $# -ne 1 ] && usage 1
help $@
;;
safe-restart|safe-start)
shift
safe_commands $@
;;
*)
usage 1
;;
esac
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