| Current Path : /usr/libexec/iptables/ |
Linux gator3171.hostgator.com 4.19.286-203.ELK.el7.x86_64 #1 SMP Wed Jun 14 04:33:55 CDT 2023 x86_64 |
| Current File : //usr/libexec/iptables/ip6tables.init |
#!/bin/bash
#
# ip6tables Start ip6tables firewall
#
# chkconfig: 2345 08 92
# description: Starts, stops and saves ip6tables firewall
#
# config: /etc/sysconfig/ip6tables
# config: /etc/sysconfig/ip6tables-config
#
### BEGIN INIT INFO
# Provides: ip6tables
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start and stop ip6tables firewall
# Description: Start, stop and save ip6tables firewall
### END INIT INFO
# Source function library.
. /etc/init.d/functions
IP6TABLES=ip6tables
IP6TABLES_DATA=/etc/sysconfig/$IP6TABLES
IP6TABLES_FALLBACK_DATA=${IP6TABLES_DATA}.fallback
IP6TABLES_CONFIG=/etc/sysconfig/${IP6TABLES}-config
IPV=${IP6TABLES%tables} # ip for ipv4 | ip6 for ipv6
[ "$IPV" = "ip" ] && _IPV="ipv4" || _IPV="ipv6"
PROC_IP6TABLES_NAMES=/proc/net/${IPV}_tables_names
VAR_SUBSYS_IP6TABLES=/var/lock/subsys/$IP6TABLES
RESTORECON=$(which restorecon 2>/dev/null)
[ ! -x "$RESTORECON" ] && RESTORECON=/bin/true
# only usable for root
if [ $EUID != 0 ]; then
echo -n $"${IP6TABLES}: Only usable by root."; warning; echo
exit 4
fi
if [ ! -x /sbin/$IP6TABLES ]; then
echo -n $"${IP6TABLES}: /sbin/$IP6TABLES does not exist."; warning; echo
exit 5
fi
# Default firewall configuration:
IP6TABLES_MODULES=""
IP6TABLES_SAVE_ON_STOP="no"
IP6TABLES_SAVE_ON_RESTART="no"
IP6TABLES_SAVE_COUNTER="no"
IP6TABLES_STATUS_NUMERIC="yes"
IP6TABLES_STATUS_VERBOSE="no"
IP6TABLES_STATUS_LINENUMBERS="yes"
IP6TABLES_SYSCTL_LOAD_LIST=""
IP6TABLES_RESTORE_WAIT=600
IP6TABLES_RESTORE_WAIT_INTERVAL=1000000
# Load firewall configuration.
[ -f "$IP6TABLES_CONFIG" ] && . "$IP6TABLES_CONFIG"
# Get active tables
NF_TABLES=$(cat "$PROC_IP6TABLES_NAMES" 2>/dev/null)
# Prepare commands for wait options
IP6TABLES_CMD="$IP6TABLES"
IP6TABLES_RESTORE_CMD="$IP6TABLES-restore"
if [ $IP6TABLES_RESTORE_WAIT -ne 0 ]; then
OPT="--wait ${IP6TABLES_RESTORE_WAIT}"
if [ $IP6TABLES_RESTORE_WAIT_INTERVAL -lt 1000000 ]; then
OPT+=" --wait-interval ${IP6TABLES_RESTORE_WAIT_INTERVAL}"
fi
IP6TABLES_CMD+=" $OPT"
IP6TABLES_RESTORE_CMD+=" $OPT"
fi
flush_n_delete() {
local ret=0
# Flush firewall rules and delete chains.
[ ! -e "$PROC_IP6TABLES_NAMES" ] && return 0
# Check if firewall is configured (has tables)
[ -z "$NF_TABLES" ] && return 1
echo -n $"${IP6TABLES}: Flushing firewall rules: "
# For all tables
for i in $NF_TABLES; do
# Flush firewall rules.
$IP6TABLES_CMD -t $i -F;
let ret+=$?;
# Delete firewall chains.
$IP6TABLES_CMD -t $i -X;
let ret+=$?;
# Set counter to zero.
$IP6TABLES_CMD -t $i -Z;
let ret+=$?;
done
[ $ret -eq 0 ] && success || failure
echo
return $ret
}
set_policy() {
local ret=0
# Set policy for configured tables.
policy=$1
# Check if iptable module is loaded
[ ! -e "$PROC_IP6TABLES_NAMES" ] && return 0
# Check if firewall is configured (has tables)
tables=$(cat "$PROC_IP6TABLES_NAMES" 2>/dev/null)
[ -z "$tables" ] && return 1
echo -n $"${IP6TABLES}: Setting chains to policy $policy: "
for i in $tables; do
echo -n "$i "
case "$i" in
raw)
$IP6TABLES_CMD -t raw -P PREROUTING $policy \
&& $IP6TABLES_CMD -t raw -P OUTPUT $policy \
|| let ret+=1
;;
filter)
$IP6TABLES_CMD -t filter -P INPUT $policy \
&& $IP6TABLES_CMD -t filter -P OUTPUT $policy \
&& $IP6TABLES_CMD -t filter -P FORWARD $policy \
|| let ret+=1
;;
nat)
$IP6TABLES_CMD -t nat -P PREROUTING $policy \
&& $IP6TABLES_CMD -t nat -P POSTROUTING $policy \
&& $IP6TABLES_CMD -t nat -P OUTPUT $policy \
|| let ret+=1
;;
mangle)
$IP6TABLES_CMD -t mangle -P PREROUTING $policy \
&& $IP6TABLES_CMD -t mangle -P POSTROUTING $policy \
&& $IP6TABLES_CMD -t mangle -P INPUT $policy \
&& $IP6TABLES_CMD -t mangle -P OUTPUT $policy \
&& $IP6TABLES_CMD -t mangle -P FORWARD $policy \
|| let ret+=1
;;
security)
# Ignore the security table
;;
*)
let ret+=1
;;
esac
done
[ $ret -eq 0 ] && success || failure
echo
return $ret
}
load_sysctl() {
local ret=0
# load matched sysctl values
if [ -n "$IP6TABLES_SYSCTL_LOAD_LIST" ]; then
echo -n $"Loading sysctl settings: "
for item in $IP6TABLES_SYSCTL_LOAD_LIST; do
fgrep -hs $item /etc/sysctl.d/* | sysctl -p - >/dev/null
let ret+=$?;
done
[ $ret -eq 0 ] && success || failure
echo
fi
return $ret
}
start() {
local ret=0
# Do not start if there is no config file.
if [ ! -f "$IP6TABLES_DATA" ]; then
echo -n $"${IP6TABLES}: No config file."; warning; echo
return 6
fi
# check if ipv6 module load is deactivated
if [ "${_IPV}" = "ipv6" ] \
&& grep -qIsE "^install[[:space:]]+${_IPV}[[:space:]]+/bin/(true|false)" /etc/modprobe.conf /etc/modprobe.d/* ; then
echo $"${IP6TABLES}: ${_IPV} is disabled."
return 150
fi
echo -n $"${IP6TABLES}: Applying firewall rules: "
OPT=
[ "x$IP6TABLES_SAVE_COUNTER" = "xyes" ] && OPT="-c"
$IP6TABLES_RESTORE_CMD $OPT $IP6TABLES_DATA
if [ $? -eq 0 ]; then
success; echo
else
failure; echo;
if [ -f "$IP6TABLES_FALLBACK_DATA" ]; then
echo -n $"${IP6TABLES}: Applying firewall fallback rules: "
$IP6TABLES_RESTORE_CMD $OPT $IP6TABLES_FALLBACK_DATA
if [ $? -eq 0 ]; then
success; echo
else
failure; echo; return 1
fi
else
return 1
fi
fi
# Load additional modules (helpers)
if [ -n "$IP6TABLES_MODULES" ]; then
echo -n $"${IP6TABLES}: Loading additional modules: "
for mod in $IP6TABLES_MODULES; do
echo -n "$mod "
modprobe $mod > /dev/null 2>&1
let ret+=$?;
done
[ $ret -eq 0 ] && success || failure
echo
fi
# Load sysctl settings
load_sysctl
touch $VAR_SUBSYS_IP6TABLES
return $ret
}
stop() {
local ret=0
# Do not stop if ip6tables module is not loaded.
[ ! -e "$PROC_IP6TABLES_NAMES" ] && return 0
# Set default chain policy to ACCEPT, in order to not break shutdown
# on systems where the default policy is DROP and root device is
# network-based (i.e.: iSCSI, NFS)
set_policy ACCEPT
let ret+=$?
# And then, flush the rules and delete chains
flush_n_delete
let ret+=$?
rm -f $VAR_SUBSYS_IP6TABLES
return $ret
}
save() {
local ret=0
# Check if iptable module is loaded
if [ ! -e "$PROC_IP6TABLES_NAMES" ]; then
echo -n $"${IP6TABLES}: Nothing to save."; warning; echo
return 0
fi
# Check if firewall is configured (has tables)
if [ -z "$NF_TABLES" ]; then
echo -n $"${IP6TABLES}: Nothing to save."; warning; echo
return 6
fi
echo -n $"${IP6TABLES}: Saving firewall rules to $IP6TABLES_DATA: "
OPT=
[ "x$IP6TABLES_SAVE_COUNTER" = "xyes" ] && OPT="-c"
TMP_FILE=$(/bin/mktemp -q $IP6TABLES_DATA.XXXXXX) \
&& chmod 600 "$TMP_FILE" \
&& $IP6TABLES-save $OPT > $TMP_FILE 2>/dev/null \
&& size=$(stat -c '%s' $TMP_FILE) && [ $size -gt 0 ] \
|| ret=1
if [ $ret -eq 0 ]; then
if [ -e $IP6TABLES_DATA ]; then
cp -f $IP6TABLES_DATA $IP6TABLES_DATA.save \
&& chmod 600 $IP6TABLES_DATA.save \
&& $RESTORECON $IP6TABLES_DATA.save \
|| ret=1
fi
if [ $ret -eq 0 ]; then
mv -f $TMP_FILE $IP6TABLES_DATA \
&& chmod 600 $IP6TABLES_DATA \
&& $RESTORECON $IP6TABLES_DATA \
|| ret=1
fi
fi
rm -f $TMP_FILE
[ $ret -eq 0 ] && success || failure
echo
return $ret
}
status() {
if [ ! -f "$VAR_SUBSYS_IP6TABLES" ] && [ -z "$NF_TABLES" ]; then
echo $"${IP6TABLES}: Firewall is not running."
return 3
fi
# Do not print status if lockfile is missing and ip6tables modules are not
# loaded.
# Check if iptable modules are loaded
if [ ! -e "$PROC_IP6TABLES_NAMES" ]; then
echo $"${IP6TABLES}: Firewall modules are not loaded."
return 3
fi
# Check if firewall is configured (has tables)
if [ -z "$NF_TABLES" ]; then
echo $"${IP6TABLES}: Firewall is not configured. "
return 3
fi
NUM=
[ "x$IP6TABLES_STATUS_NUMERIC" = "xyes" ] && NUM="-n"
VERBOSE=
[ "x$IP6TABLES_STATUS_VERBOSE" = "xyes" ] && VERBOSE="--verbose"
COUNT=
[ "x$IP6TABLES_STATUS_LINENUMBERS" = "xyes" ] && COUNT="--line-numbers"
for table in $NF_TABLES; do
echo $"Table: $table"
$IP6TABLES -t $table --list $NUM $VERBOSE $COUNT && echo
done
return 0
}
reload() {
local ret=0
# Do not reload if there is no config file.
if [ ! -f "$IP6TABLES_DATA" ]; then
echo -n $"${IP6TABLES}: No config file."; warning; echo
return 6
fi
# check if ipv6 module load is deactivated
if [ "${_IPV}" = "ipv6" ] \
&& grep -qIsE "^install[[:space:]]+${_IPV}[[:space:]]+/bin/(true|false)" /etc/modprobe.conf /etc/modprobe.d/* ; then
echo $"${IP6TABLES}: ${_IPV} is disabled."
return 150
fi
echo -n $"${IP6TABLES}: Trying to reload firewall rules: "
OPT=
[ "x$IP6TABLES_SAVE_COUNTER" = "xyes" ] && OPT="-c"
$IP6TABLES_RESTORE_CMD $OPT $IP6TABLES_DATA
if [ $? -eq 0 ]; then
success; echo
else
failure; echo; echo "Firewall rules are not changed."; return 1
fi
# Load additional modules (helpers)
if [ -n "$IP6TABLES_MODULES" ]; then
echo -n $"${IP6TABLES}: Loading additional modules: "
for mod in $IP6TABLES_MODULES; do
echo -n "$mod "
modprobe $mod > /dev/null 2>&1
let ret+=$?;
done
[ $ret -eq 0 ] && success || failure
echo
fi
# Load sysctl settings
load_sysctl
return $ret
}
restart() {
[ "x$IP6TABLES_SAVE_ON_RESTART" = "xyes" ] && save
stop
start
}
case "$1" in
start)
[ -f "$VAR_SUBSYS_IP6TABLES" ] && exit 0
start
RETVAL=$?
;;
stop)
[ "x$IP6TABLES_SAVE_ON_STOP" = "xyes" ] && save
stop
RETVAL=$?
;;
restart|force-reload)
restart
RETVAL=$?
;;
reload)
[ -e "$VAR_SUBSYS_IP6TABLES" ] && reload
RETVAL=$?
;;
condrestart|try-restart)
[ ! -e "$VAR_SUBSYS_IP6TABLES" ] && exit 0
restart
RETVAL=$?
;;
status)
status
RETVAL=$?
;;
panic)
set_policy DROP
RETVAL=$?
;;
save)
save
RETVAL=$?
;;
*)
echo $"Usage: ${IP6TABLES} {start|stop|reload|restart|condrestart|status|panic|save}"
RETVAL=2
;;
esac
exit $RETVAL