iptables

#!/sbin/runscript# Copyright 1999-2005 Gentoo Foundation# Distributed under the terms of the GNU General Public License v2# $Header: /var/cvsroot/gentoo-x86/net-firewall/iptables/files/iptables-1.3.2.init,v 1.4 2006/11/11 08:25:00 vapier Exp $opts="save reload panic"iptables_name=${SVCNAME}if [[ ${iptables_name} != "iptables" && ${iptables_name} != "ip6tables" ]] ; then	iptables_name="iptables"fiiptables_bin="/sbin/${iptables_name}"case ${iptables_name} in	iptables)  iptables_proc="/proc/net/ip_tables_names"	           iptables_save=${IPTABLES_SAVE};;	ip6tables) iptables_proc="/proc/net/ip6_tables_names"	           iptables_save=${IP6TABLES_SAVE};;esacdepend() {	before net	use logger}set_table_policy() {	local chains table=$1 policy=$2	case ${table} in		nat)    chains="PREROUTING POSTROUTING OUTPUT";;		mangle) chains="PREROUTING INPUT FORWARD OUTPUT POSTROUTING";;		filter) chains="INPUT FORWARD OUTPUT";;		*)      chains="";;	esac	local chain	for chain in ${chains} ; do		${iptables_bin} -t ${table} -P ${chain} ${policy}	done}checkkernel() {	if [[ ! -e ${iptables_proc} ]] ; then		eerror "Your kernel lacks ${iptables_name} support, please load"		eerror "appropriate modules and try again."		return 1	fi	return 0}checkconfig() {	if [[ ! -f ${iptables_save} ]] ; then		eerror "Not starting ${iptables_name}.  First create some rules then run:"		eerror "/etc/init.d/${iptables_name} save"		return 1	fi	return 0}start() {	checkconfig || return 1	ebegin "Loading ${iptables_name} state and starting firewall"	${iptables_bin}-restore ${SAVE_RESTORE_OPTIONS} < "${iptables_save}"	eend $?}stop() {	if [[ ${SAVE_ON_STOP} == "yes" ]] ; then		save || return 1	fi	checkkernel || return 1	ebegin "Stopping firewall"	for a in $(<${iptables_proc}) ; do		set_table_policy $a ACCEPT		${iptables_bin} -F -t $a		${iptables_bin} -X -t $a	done	eend $?}reload() {	checkkernel || return 1	ebegin "Flushing firewall"	for a in $(<${iptables_proc}) ; do		${iptables_bin} -F -t $a		${iptables_bin} -X -t $a	done	eend $?	start}save() {	ebegin "Saving ${iptables_name} state"	touch "${iptables_save}"	chmod 0600 "${iptables_save}"	${iptables_bin}-save ${SAVE_RESTORE_OPTIONS} > "${iptables_save}"	eend $?}panic() {	checkkernel || return 1	[[ -e ${svcdir}/started/${iptables_name} ]] && svc_stop	ebegin "Dropping all packets"	for a in $(<${iptables_proc}) ; do		${iptables_bin} -F -t $a		${iptables_bin} -X -t $a		set_table_policy $a DROP	done	eend $?}