133 lines
3.0 KiB
Plaintext
133 lines
3.0 KiB
Plaintext
#!/sbin/openrc-run
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# Copyright 1999-2011 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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# $Header: /var/cvsroot/gentoo-x86/net-firewall/iptables/files/iptables-1.4.11.init,v 1.2 2011/12/04 10:15:59 swegener Exp $
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description="IPv4/IPv6 packet filtering and NAT"
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description_save="Save firewall state"
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description_panic="Drop all packets"
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description_reload="Reload configuration"
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extra_commands="save panic"
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extra_started_commands="reload"
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iptables_name="${SVCNAME%%.*}"
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iptables_bin="/sbin/${iptables_name}"
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case ${iptables_name} in
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iptables) iptables_proc="/proc/net/ip_tables_names"
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iptables_save=${IPTABLES_SAVE}
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sysctl_ipfwd=net.ipv4.ip_forward;;
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ip6tables) iptables_proc="/proc/net/ip6_tables_names"
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iptables_save=${IP6TABLES_SAVE}
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sysctl_ipfwd=net.ipv6.conf.all.forwarding;;
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esac
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depend() {
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before net
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after sysctl
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use logger
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provide firewall
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}
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set_table_policy() {
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local chains table=$1 policy=$2
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case ${table} in
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nat) chains="PREROUTING POSTROUTING OUTPUT";;
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mangle) chains="PREROUTING INPUT FORWARD OUTPUT POSTROUTING";;
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filter) chains="INPUT FORWARD OUTPUT";;
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*) chains="";;
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esac
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local chain
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for chain in ${chains} ; do
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${iptables_bin} -t ${table} -P ${chain} ${policy}
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done
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}
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checkkernel() {
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if [ ! -e ${iptables_proc} ] ; then
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eerror "Your kernel lacks ${iptables_name} support, please load"
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eerror "appropriate modules and try again."
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return 1
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fi
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return 0
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}
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checkconfig() {
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if [ ! -f ${iptables_save} ] ; then
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eerror "Not starting ${iptables_name}. First create some rules then run:"
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eerror "/etc/init.d/${iptables_name} save"
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return 1
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fi
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return 0
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}
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start() {
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checkconfig || return 1
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ebegin "Loading ${iptables_name} state and starting firewall"
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${iptables_bin}-restore ${SAVE_RESTORE_OPTIONS} < "${iptables_save}"
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eend $?
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if yesno "${IPFORWARD}"; then
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ebegin "Enabling forwarding"
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/sbin/sysctl -w ${sysctl_ipfwd}=1 > /dev/null
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eend $?
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fi
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}
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stop() {
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if yesno "${IPFORWARD}"; then
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ebegin "Disabling forwarding"
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/sbin/sysctl -w ${sysctl_ipfwd}=0 > /dev/null
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eend $?
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fi
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if yesno "${SAVE_ON_STOP}"; then
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save || return 1
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fi
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checkkernel || return 1
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ebegin "Stopping firewall"
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local a
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for a in $(cat ${iptables_proc}) ; do
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set_table_policy $a ACCEPT
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${iptables_bin} -F -t $a
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${iptables_bin} -X -t $a
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done
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eend $?
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}
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reload() {
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checkkernel || return 1
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ebegin "Flushing firewall"
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local a
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for a in $(cat ${iptables_proc}) ; do
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${iptables_bin} -F -t $a
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${iptables_bin} -X -t $a
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done
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eend $?
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start
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}
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save() {
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ebegin "Saving ${iptables_name} state"
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checkpath -fm 0600 "${iptables_save}"
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${iptables_bin}-save ${SAVE_RESTORE_OPTIONS} > "${iptables_save}"
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eend $?
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}
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panic() {
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checkkernel || return 1
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if service_started ${iptables_name}; then
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rc-service ${iptables_name} stop
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fi
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local a
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ebegin "Dropping all packets"
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for a in $(cat ${iptables_proc}) ; do
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${iptables_bin} -F -t $a
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${iptables_bin} -X -t $a
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set_table_policy $a DROP
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done
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eend $?
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}
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