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shorewall_code/Shorewall/firewall
teastep 1c76d5b110 Consolidate functions into lib.base 
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@4415 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
2006-08-24 21:40:54 +00:00

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#!/bin/sh
#
# The Shoreline Firewall (Shorewall) Packet Filtering Firewall - 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)
#
# tcstart from tc4shorewall Version 0.5
# (c) 2005 Arne Bernin <arne@ucbering.de>
# Modified by Tom Eastep for integration into the Shorewall distribution
# published under GPL Version 2#
#
# Complete documentation is available at http://shorewall.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.
#
# Commands are:
#
# shorewall start Starts the firewall
# shorewall restart Restarts the firewall
# shorewall stop Stops the firewall
# shorewall reset Resets iptables packet and
# byte counts
# shorewall clear Remove all Shorewall chains
# and rules/policies.
# shorewall refresh . Rebuild the common chain
#
# Mutual exclusion -- These functions are jackets for the mutual exclusion
# routines in $FUNCTIONS. They invoke
# the corresponding function in that file if the user did
# not specify "nolock" on the runline.
#
my_mutex_on() {
[ -n "$NOLOCK" ] || { mutex_on; HAVE_MUTEX=Yes; }
}
my_mutex_off() {
[ -n "$HAVE_MUTEX" ] && { mutex_off; HAVE_MUTEX=; }
}
#
# Fatal error -- stops the firewall after issuing the error message
#
fatal_error() # $* = Error Message
{
echo " ERROR: $@" >&2
stop_firewall
exit 2
}
#
# Fatal error during startup -- generate an error message and abend without
# altering the state of the firewall
#
startup_error() # $* = Error Message
{
echo " ERROR: $@" >&2
my_mutex_off
[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
[ -n "$RESTOREBASE" ] && rm -f $RESTOREBASE
kill $$
exit 2
}
#
# Send a message to STDOUT and the System Log
#
report () { # $* = message
progress_message3 "$@"
logger "$@"
}
#
# Run iptables and if an error occurs, stop the firewall and quit
#
run_iptables() {
if [ -z "$KLUDGEFREE" ]; then
#
# Purge the temporary files that we use to prevent duplicate '-m' specifications
#
[ -n "$BRIDGING" ] && [ -f $TMP_DIR/physdev ] && rm -f $TMP_DIR/physdev
[ -n "$IPRANGE_MATCH" ] && [ -f $TMP_DIR/iprange ] && rm -f $TMP_DIR/iprange
fi
if ! $IPTABLES $@ ; then
if [ -z "$STOPPING" ]; then
error_message "ERROR: Command \"$IPTABLES $@\" Failed"
stop_firewall
exit 2
fi
fi
}
#
# Version of 'run_iptables' that inserts white space after "!" in the arg list
#
run_iptables2() {
case "$@" in
*!*)
run_iptables $(fix_bang $@)
;;
*)
run_iptables $@
;;
esac
}
#
# Quietly run iptables
#
qt_iptables() {
if [ -z "$KLUDGEFREE" ]; then
#
# Purge the temporary files that we use to prevent duplicate '-m' specifications
#
[ -n "$BRIDGING" ] && [ -f $TMP_DIR/physdev ] && rm -f $TMP_DIR/physdev
[ -n "$IPRANGE_MATCH" ] && [ -f $TMP_DIR/iprange ] && rm -f $TMP_DIR/iprange
fi
qt $IPTABLES $@
}
#
# Run ip and if an error occurs, stop the firewall and quit
#
run_ip() {
if ! ip $@ ; then
if [ -z "$STOPPING" ]; then
error_message "ERROR: Command \"ip $@\" Failed"
stop_firewall
exit 2
fi
fi
}
#
# Run tc and if an error occurs, stop the firewall and quit
#
run_tc() {
if ! tc $@ ; then
if [ -z "$STOPPING" ]; then
error_message "ERROR: Command \"tc $@\" Failed"
stop_firewall
exit 2
fi
fi
}
#
# Delete a chain if it exists
#
deletechain() # $1 = name of chain
{
qt $IPTABLES -L $1 -n && qt $IPTABLES -F $1 && qt $IPTABLES -X $1
}
#
# Determine if a chain is a policy chain
#
is_policy_chain() # $1 = name of chain
{
eval test \"\$${1}_is_policy\" = Yes
}
#
# Set a standard chain's policy
#
setpolicy() # $1 = name of chain, $2 = policy
{
run_iptables -P $1 $2
}
#
# Set a standard chain to enable established and related connections
#
setcontinue() # $1 = name of chain
{
run_iptables -A $1 -m state --state ESTABLISHED,RELATED -j ACCEPT
}
#
# Flush one of the NAT table chains
#
flushnat() # $1 = name of chain
{
run_iptables -t nat -F $1
}
#
# Flush one of the Mangle table chains
#
flushmangle() # $1 = name of chain
{
run_iptables -t mangle -F $1
}
#
# This function assumes that the TMP_DIR variable is set and that
# its value names an existing directory.
#
determine_zones()
{
local zone parent parents rest new_zone_file= r
merge_zone()
{
local z zones="$ZONES" merged=
if [ -n "$parents" ]; then
ZONES=
for z in $zones; do
if [ -z "$merged" ] && list_search $z $parents; then
ZONES="$ZONES $zone"
merged=Yes
fi
ZONES="$ZONES $z"
done
else
ZONES="$ZONES $zone"
fi
}
strip_file zones
ZONES=
IPV4_ZONES=
IPSEC_ZONES=
[ "$IPSECFILE" = zones ] && new_zone_file=Yes || test -n "${FW:=fw}"
while read zone type rest; do
expandv zone type
case $zone in
*:*)
parents=${zone#*:}
zone=${zone%:*}
[ -n "$zone" ] || startup_error "Invalid nested zone syntax: :$parents"
parents=$(separate_list $parents)
;;
*)
parents=
;;
esac
for parent in $parents; do
[ "$parent" = "$FW" ] && startup_error "Sub-zones of the firewall zone are not allowed"
list_search $parent $ZONES || startup_error "Parent zone not defined: $parent"
done
[ ${#zone} -gt 5 ] && startup_error "Zone name longer than 5 characters: $zone"
case "$zone" in
[0-9*])
startup_error "Illegal zone name \"$zone\" in zones file"
;;
all|none)
startup_error "Reserved zone name \"$zone\" in zones file"
;;
esac
if [ -n "$new_zone_file" ]; then
case ${type:=ipv4} in
ipv4|IPv4|IPV4|plain|-)
list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
merge_zone
IPV4_ZONES="$IPV4_ZONES $zone"
;;
ipsec|IPSEC|ipsec4|IPSEC4)
list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
[ -n "$POLICY_MATCH" ] || fatal_error "Your kernel and/or iptables does not support policy match"
eval ${zone}_is_ipsec=Yes
eval ${zone}_is_complex=Yes
merge_zone
IPSEC_ZONES="$IPSEC_ZONES $zone"
;;
firewall)
[ -n "$FW" ] && startup_error "Only one firewall zone may be defined"
list_search $zone $ZONES && startup_error "Zone $zone is defined more than once"
[ -n "$parents" ] && startup_error "The firewall zone may not be nested"
for r in $rest; do
[ "x$r" = x- ] || startup_error "OPTIONS not allowed on the firewall zone"
done
FW=$zone
;;
*)
startup_error "Invalid Zone Type: $type"
;;
esac
eval ${zone}_type=$type
else
list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
ZONES="$ZONES $zone"
IPV4_ZONES="$IPV4_ZONES $zone"
eval ${zone}_type=ipv4
fi
done < $TMP_DIR/zones
[ -z "$ZONES" ] && startup_error "No ipv4 or ipsec Zones Defined"
[ -z "$FW" ] && startup_error "No Firewall Zone Defined"
}
#
# Find interfaces to a given zone
#
# Search the variables representing the contents of the interfaces file and
# for each record matching the passed ZONE, echo the expanded contents of
# the "INTERFACE" column
#
find_interfaces() # $1 = interface zone
{
local zne=$1
local z
local interface
for interface in $ALL_INTERFACES; do
eval z=\$$(chain_base $interface)_zone
[ "x${z}" = x${zne} ] && echo $interface
done
}
#
# Forward Chain for an interface
#
forward_chain() # $1 = interface
{
echo $(chain_base $1)_fwd
}
#
# Input Chain for an interface
#
input_chain() # $1 = interface
{
echo $(chain_base $1)_in
}
#
# Output Chain for an interface
#
output_chain() # $1 = interface
{
echo $(chain_base $1)_out
}
#
# Masquerade Chain for an interface
#
masq_chain() # $1 = interface
{
echo $(chain_base $1)_masq
}
#
# MAC Verification Chain for an interface
#
mac_chain() # $1 = interface
{
echo $(chain_base $1)_mac
}
macrecent_target() # $1 - interface
{
[ -n "$MACLIST_TTL" ] && echo $(chain_base $1)_rec || echo RETURN
}
#
# DNAT Chain from a zone
#
dnat_chain() # $1 = zone
{
echo ${1}_dnat
}
#
# SNAT Chain to an interface
#
snat_chain() # $1 = interface
{
echo $(chain_base $1)_snat
}
#
# ECN Chain to an interface
#
ecn_chain() # $1 = interface
{
echo $(chain_base $1)_ecn
}
#
# First chains for an interface
#
first_chains() #$1 = interface
{
local c=$(chain_base $1)
echo ${c}_fwd ${c}_in
}
#
# Horrible hack to work around an iptables limitation
#
iprange_echo()
{
if [ -n "$KLUDGEFREE" ]; then
echo "-m iprange $@"
elif [ -f $TMP_DIR/iprange ]; then
echo $@
else
echo "-m iprange $@"
> $TMP_DIR/iprange
fi
}
#
# Get set flags (ipsets).
#
get_set_flags() # $1 = set name and optional [levels], $2 = src or dst
{
local temp setname=$1 options=$2
[ -n "$IPSET_MATCH" ] || fatal_error "Your kernel and/or iptables does not include ipset match: $1"
case $1 in
*\[[1-6]\])
temp=${1#*\[}
temp=${temp%\]}
setname=${1%\[*}
while [ $temp -gt 1 ]; do
options="$options,$2"
temp=$(($temp - 1))
done
;;
*\[*\])
options=${1#*\[}
options=${options%\]}
setname=${1%\[*}
;;
*)
;;
esac
echo "--set ${setname#+} $options"
}
#
# Horrible hack to work around an iptables limitation
#
physdev_echo()
{
if [ -n "$KLUDGEFREE" ]; then
echo -m physdev $@
elif [ -f $TMP_DIR/physdev ]; then
echo $@
else
echo -m physdev $@
> $TMP_DIR/physdev
fi
}
#
# We allow hosts to be specified by IP address or by physdev. These two functions
# are used to produce the proper match in a netfilter rule.
#
match_source_hosts()
{
if [ -n "$BRIDGING" ]; then
case $1 in
*:*)
physdev_echo "--physdev-in ${1%:*} $(source_ip_range ${1#*:})"
;;
*.*.*.*|+*|!+*)
echo $(source_ip_range $1)
;;
*)
physdev_echo "--physdev-in $1"
;;
esac
else
echo $(source_ip_range $1)
fi
}
match_dest_hosts()
{
if [ -n "$BRIDGING" ]; then
case $1 in
*:*)
physdev_echo "--physdev-out ${1%:*} $(dest_ip_range ${1#*:})"
;;
*.*.*.*|+*|!+*)
echo $(dest_ip_range $1)
;;
*)
physdev_echo "--physdev-out $1"
;;
esac
else
echo $(dest_ip_range $1)
fi
}
#
# Similarly, the source or destination in a rule can be qualified by a device name. If
# the device is defined in ${CONFDIR}/interfaces then a normal interface match is
# generated (-i or -o); otherwise, a physdev match is generated.
#-------------------------------------------------------------------------------------
#
# loosely match the passed interface with those in ${CONFDIR}/interfaces.
#
known_interface() # $1 = interface name
{
local iface
for iface in $ALL_INTERFACES ; do
if if_match $iface $1 ; then
return 0
fi
done
return 1
}
known_port() # $1 = port name
{
local port
for port in $ALL_PORTS ; do
if if_match $port $1 ; then
return 0
fi
done
return 1
}
match_source_dev()
{
if [ -n "$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 $1
fi
}
#
#
# Validate the zone names and options in the interfaces file
#
validate_interfaces_file() {
local wildcard
local found_obsolete_option=
local z interface networks options r iface option
while read z interface networks options; do
expandv z interface networks options
r="$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"
}
#
# 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
}
#
# 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=${VARDIR}/$RESTOREFILE
if [ -x $RESTOREPATH ]; then
if [ -x ${RESTOREPATH}-ipsets ]; then
progress_message2 Restoring Ipsets...
#
# We must purge iptables to be sure that there are no
# references to ipsets
#
for table in mangle nat filter; do
iptables -t $table -F
iptables -t $table -X
done
${RESTOREPATH}-ipsets
fi
echo Restoring 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"
}
#
# Delete existing Proxy ARP
#
delete_proxy_arp() {
if [ -f ${VARDIR}/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 < ${VARDIR}/proxyarp
rm -f ${VARDIR}/proxyarp
fi
[ -d ${VARDIR} ] && touch ${VARDIR}/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 ${VARDIR}/nat ]; then
while read external interface; do
qt ip addr del $external dev $interface
done < ${VARDIR}/nat
rm -f ${VARDIR}/nat
fi
[ -d ${VARDIR} ] && touch ${VARDIR}/nat
}
#
# 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 < $TMP_DIR/blacklist
fi
}
#
# Verify that kernel has netfilter support
#
verify_os_version() {
osversion=$(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 " ${CONFDIR}/shorewall.conf"
[ -n "$TMP_DIR" ] && rm -rf $TMP_DIR
my_mutex_off
exit 2
fi
}
#
# Refresh queuing and classes
#
refresh_tc() {
#
# tc4shorewall (setup_traffic_shaping()) uses this function to report progress
#
progress_message_and_save()
{
progress_message $@
}
echo "Refreshing Traffic Control Rules..."
[ -n "$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
if [ -s $TMP_DIR/tcrules ]; then
lib_load tcrules LIB_TCRULES_LOADED "Entries in the tcrules file require the Shorewall library lib.tcrules which is not installed"
while read mark sources dests proto ports sports user testval; do
expandv mark sources dests proto ports sports user testval tos
rule=$(echo "$mark $sources $dests $proto $ports $sports $user $testval $tos")
process_tc_rule
done < $TMP_DIR/tcrules
fi
if [ -n "$TC_SCRIPT" ]; then
run_user_exit $TC_SCRIPT
elif [ -n "$TC_ENABLED" ]; then
strip_file tcdevices
strip_file tcclasses
if [ -s $TMP_DIR/tcdevices -o -s $TMP_DIR/tcclasses ]; then
lib_load tc LIB_TC_LOADED "Entries in the tcdevices file require the Shorewall library lib.tc which is not installed"
setup_traffic_shaping
fi
fi
}
#
# Refresh the firewall
#
refresh_firewall()
{
DOING=Refreshing
DONE=Refreshed
progress_message3 "Refreshing Shorewall..."
progress_message2 "Determining Zones and Interfaces..."
determine_zones
validate_interfaces_file
determine_interfaces
run_user_exit refresh
#
# Blacklist
#
strip_file blacklist
refresh_blacklist
ecn=$(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
}
#
# 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 $1"
;;
esac
fi
}
#
# Initialize this program
#
do_initialize() {
# Run all utility programs using the C locale
#
# Thanks to Vincent Planchenault for this tip #
export LC_ALL=C
# Make sure umask is sane
umask 077
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
#
# Establish termination function
#
TERMINATOR=startup_error
#
# Clear all configuration variables
#
VERSION=
IPTABLES=
FW=
SUBSYSLOCK=
ALLOWRELATED=Yes
LOGRATE=
LOGBURST=
LOGPARMS=
LOGLIMIT=
ADD_IP_ALIASES=
ADD_SNAT_ALIASES=
TC_ENABLED=
BLACKLIST_DISPOSITION=
BLACKLIST_LOGLEVEL=
CLAMPMSS=
ROUTE_FILTER=
LOG_MARTIANS=
DETECT_DNAT_IPADDRS=
MUTEX_TIMEOUT=
FORWARDPING=
MACLIST_DISPOSITION=
MACLIST_LOG_LEVEL=
TCP_FLAGS_DISPOSITION=
TCP_FLAGS_LOG_LEVEL=
RFC1918_LOG_LEVEL=
MARK_IN_FORWARD_CHAIN=
FUNCTIONS=
VERSION_FILE=
LOGFORMAT=
LOGRULENUMBERS=
ADMINISABSENTMINDED=
BLACKLISTNEWONLY=
MODULE_SUFFIX=
ACTIONS=
USEDACTIONS=
SMURF_LOG_LEVEL=
DISABLE_IPV6=
BRIDGING=
PKTTYPE=
USEPKTYPE=
RETAIN_ALIASES=
DELAYBLACKLISTLOAD=
LOGTAGONLY=
LOGALLNEW=
RFC1918_STRICT=
MACLIST_TTL=
SAVE_IPSETS=
RESTOREFILE=
MAPOLDACTIONS=
IMPLICIT_CONTINUE=
HIGH_ROUTE_MARKS=
TC_EXPERT=
RESTOREBASE=
TMP_DIR=
ALL_INTERFACES=
ROUTEMARK_INTERFACES=
IPSECMARK=256
PROVIDERS=
CRITICALHOSTS=
IPSECFILE=
EXCLUSION_SEQ=1
STOPPING=
HAVE_MUTEX=
ALIASES_TO_ADD=
SECTION=ESTABLISHED
SECTIONS=
ALL_PORTS=
SHAREDIR=/usr/share/shorewall
VARDIR=/var/lib/shorewall
CONFDIR=/etc/shorewall
FUNCTIONS=${SHAREDIR}/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 $TMP_DIR; my_mutex_off; exit 2" 1 2 3 4 5 6 9
ensure_config_path
VERSION_FILE=$SHAREDIR/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 ${VARDIR} ] || mkdir -p ${VARDIR}
else
f=$(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 $BRIDGING)
STARTUP_ENABLED=$(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 $IMPLICIT_CONTINUE)
HIGH_ROUTE_MARKS=$(added_param_value_no HIGH_ROUTE_MARKS $HIGH_ROUTE_MARKS)
TC_EXPERT=$(added_param_value_no TC_EXPERT $TC_EXPERT)
[ -n "$XCONNMARK_MATCH" ] || XCONNMARK=
[ -n "$XMARK" ] || XCONNMARK=
[ -n "$HIGH_ROUTE_MARKS" -a -z "$XCONNMARK" ] && startup_error "HIGH_ROUTE_MARKS=Yes requires extended CONNMARK target, extended CONNMARK match support and extended MARK support"
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 > ${VARDIR}/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
;;
call)
#
# Undocumented way to call functions in ${SHAREDIR}/firewall directly
#
shift
do_initialize
EMPTY=
$@
;;
*)
usage
;;
esac
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