3 # iptables Start iptables firewall
5 # chkconfig: 2345 08 92
6 # description: Starts, stops and saves iptables firewall
8 # config: /etc/sysconfig/iptables
9 # config: /etc/sysconfig/iptables-config
11 # Source function library.
12 . /etc/init.d/functions
15 IPTABLES_DATA=/etc/sysconfig/$IPTABLES
16 IPTABLES_CONFIG=/etc/sysconfig/${IPTABLES}-config
17 IPV=${IPTABLES%tables} # ip for ipv4 | ip6 for ipv6
18 PROC_IPTABLES_NAMES=/proc/net/${IPV}_tables_names
19 VAR_SUBSYS_IPTABLES=/var/lock/subsys/$IPTABLES
21 if [ ! -x /sbin/$IPTABLES ]; then
22 echo -n $"/sbin/$IPTABLES does not exist."; warning; echo
26 if lsmod 2>/dev/null | grep -q ipchains ; then
27 echo -n $"ipchains and $IPTABLES can not be used together."; warning; echo
32 /sbin/modprobe --version 2>&1 | grep -q module-init-tools \
36 # Default firewall configuration:
38 IPTABLES_MODULES_UNLOAD="yes"
39 IPTABLES_SAVE_ON_STOP="no"
40 IPTABLES_SAVE_ON_RESTART="no"
41 IPTABLES_SAVE_COUNTER="no"
42 IPTABLES_STATUS_NUMERIC="no"
44 # Load firewall configuration.
45 [ -f "$IPTABLES_CONFIG" ] && . "$IPTABLES_CONFIG"
48 # Unload module with all referring modules.
49 # At first all referring modules will be unloaded, then the module itself.
54 # Get referring modules.
55 # New modutils have another output format.
56 [ $NEW_MODUTILS = 1 ] \
57 && ref=`lsmod | awk "/^${mod}/ { print \\\$4; }" | tr ',' ' '` \
58 || ref=`lsmod | grep ^${mod} | cut -d "[" -s -f 2 | cut -d "]" -s -f 1`
60 # recursive call for all referring modules
67 # The extra test is for 2.6: The module might have autocleaned,
68 # after all referring modules are unloaded.
69 if grep -q "^${mod}" /proc/modules ; then
70 modprobe -r $mod > /dev/null 2>&1
78 # Flush firewall rules and delete chains.
79 [ -e "$PROC_IPTABLES_NAMES" ] || return 1
81 # Check if firewall is configured (has tables)
82 tables=`cat $PROC_IPTABLES_NAMES 2>/dev/null`
83 [ -z "$tables" ] && return 1
85 echo -n $"Flushing firewall rules: "
89 # Flush firewall rules.
93 # Delete firewall chains.
97 # Set counter to zero.
102 [ $ret -eq 0 ] && success || failure
108 # Set policy for configured tables.
111 # Check if iptable module is loaded
112 [ ! -e "$PROC_IPTABLES_NAMES" ] && return 1
114 # Check if firewall is configured (has tables)
115 tables=`cat $PROC_IPTABLES_NAMES 2>/dev/null`
116 [ -z "$tables" ] && return 1
118 echo -n $"Setting chains to policy $policy: "
124 $IPTABLES -t filter -P INPUT $policy \
125 && $IPTABLES -t filter -P OUTPUT $policy \
126 && $IPTABLES -t filter -P FORWARD $policy \
130 $IPTABLES -t nat -P PREROUTING $policy \
131 && $IPTABLES -t nat -P POSTROUTING $policy \
132 && $IPTABLES -t nat -P OUTPUT $policy \
136 $IPTABLES -t mangle -P PREROUTING $policy \
137 && $IPTABLES -t mangle -P POSTROUTING $policy \
138 && $IPTABLES -t mangle -P INPUT $policy \
139 && $IPTABLES -t mangle -P OUTPUT $policy \
140 && $IPTABLES -t mangle -P FORWARD $policy \
149 [ $ret -eq 0 ] && success || failure
155 # Do not start if there is no config file.
156 [ -f "$IPTABLES_DATA" ] || return 1
158 echo -n $"Applying $IPTABLES firewall rules: "
161 [ "x$IPTABLES_SAVE_COUNTER" = "xyes" ] && OPT="-c"
163 $IPTABLES-restore $OPT $IPTABLES_DATA
164 if [ $? -eq 0 ]; then
167 failure; echo; return 1
170 # Load additional modules (helpers)
171 if [ -n "$IPTABLES_MODULES" ]; then
172 echo -n $"Loading additional $IPTABLES modules: "
174 for mod in $IPTABLES_MODULES; do
176 modprobe $mod > /dev/null 2>&1
179 [ $ret -eq 0 ] && success || failure
183 touch $VAR_SUBSYS_IPTABLES
188 # Do not stop if iptables module is not loaded.
189 [ -e "$PROC_IPTABLES_NAMES" ] || return 1
194 if [ "x$IPTABLES_MODULES_UNLOAD" = "xyes" ]; then
195 echo -n $"Unloading $IPTABLES modules: "
197 rmmod_r ${IPV}_tables
199 rmmod_r ${IPV}_conntrack
201 [ $ret -eq 0 ] && success || failure
205 rm -f $VAR_SUBSYS_IPTABLES
210 # Check if iptable module is loaded
211 [ ! -e "$PROC_IPTABLES_NAMES" ] && return 1
213 # Check if firewall is configured (has tables)
214 tables=`cat $PROC_IPTABLES_NAMES 2>/dev/null`
215 [ -z "$tables" ] && return 1
217 echo -n $"Saving firewall rules to $IPTABLES_DATA: "
220 [ "x$IPTABLES_SAVE_COUNTER" = "xyes" ] && OPT="-c"
223 TMP_FILE=`/bin/mktemp -q /tmp/$IPTABLES.XXXXXX` \
224 && chmod 600 "$TMP_FILE" \
225 && $IPTABLES-save $OPT > $TMP_FILE 2>/dev/null \
226 && size=`stat -c '%s' $TMP_FILE` && [ $size -gt 0 ] \
228 if [ $ret -eq 0 ]; then
229 if [ -e $IPTABLES_DATA ]; then
230 cp -f $IPTABLES_DATA $IPTABLES_DATA.save \
231 && chmod 600 $IPTABLES_DATA.save \
234 if [ $ret -eq 0 ]; then
235 cp -f $TMP_FILE $IPTABLES_DATA \
236 && chmod 600 $IPTABLES_DATA \
240 [ $ret -eq 0 ] && success || failure
247 # Do not print status if lockfile is missing and iptables modules are not
249 # Check if iptable module is loaded
250 if [ ! -f "$VAR_SUBSYS_IPTABLES" ]; then
251 echo $"Firewall is stopped."
255 # Check if firewall is configured (has tables)
256 if [ ! -e "$PROC_IPTABLES_NAMES" ]; then
257 echo $"Firewall is not configured. "
260 tables=`cat $PROC_IPTABLES_NAMES 2>/dev/null`
261 if [ -z "$tables" ]; then
262 echo $"Firewall is not configured. "
267 [ "x$IPTABLES_STATUS_NUMERIC" = "xyes" ] && NUM="-n"
269 for table in $tables; do
270 echo $"Table: $table"
271 $IPTABLES -t $table --list $NUM && echo
278 [ "x$IPTABLES_SAVE_ON_RESTART" = "xyes" ] && save
290 [ "x$IPTABLES_SAVE_ON_STOP" = "xyes" ] && save
299 [ -e "$VAR_SUBSYS_IPTABLES" ] && restart
315 echo $"Usage: $0 {start|stop|restart|condrestart|status|panic|save}"