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#!/sbin/runscript
# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
opts="start stop reload"
depend() {
before net
need logger
}
start() {
ebegin "Starting firewall"
# enable IP forwarding
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward
# default policy is DROP
/sbin/iptables -P INPUT DROP
/sbin/iptables -P OUTPUT DROP
/sbin/iptables -P FORWARD DROP
/sbin/ip6tables -P INPUT DROP
/sbin/ip6tables -P OUTPUT DROP
/sbin/ip6tables -P FORWARD DROP
# allow esp
ip6tables -A INPUT -i eth0 -p 50 -j ACCEPT
ip6tables -A OUTPUT -o eth0 -p 50 -j ACCEPT
# allow IKE
ip6tables -A INPUT -i eth0 -p udp --sport 500 --dport 500 -j ACCEPT
ip6tables -A OUTPUT -o eth0 -p udp --dport 500 --sport 500 -j ACCEPT
# allow MobIKE
ip6tables -A INPUT -i eth0 -p udp --sport 4500 --dport 4500 -j ACCEPT
ip6tables -A OUTPUT -o eth0 -p udp --dport 4500 --sport 4500 -j ACCEPT
# allow ICMPv6 neighbor-solicitations
ip6tables -A INPUT -p icmpv6 --icmpv6-type neighbor-solicitation -j ACCEPT
ip6tables -A OUTPUT -p icmpv6 --icmpv6-type neighbor-solicitation -j ACCEPT
# allow ICMPv6 neighbor-advertisements
ip6tables -A INPUT -p icmpv6 --icmpv6-type neighbor-advertisement -j ACCEPT
ip6tables -A OUTPUT -p icmpv6 --icmpv6-type neighbor-advertisement -j ACCEPT
# allow last IPv6 UDP fragments
ip6tables -A INPUT -p udp -m frag --fraglast -j ACCEPT
ip6tables -A OUTPUT -p udp -m frag --fraglast -j ACCEPT
# allow crl and certificate fetch from winnetou
ip6tables -A INPUT -i eth0 -p tcp --sport 80 -s PH_IP6_WINNETOU -j ACCEPT
ip6tables -A OUTPUT -o eth0 -p tcp --dport 80 -d PH_IP6_WINNETOU -j ACCEPT
# allow ssh
iptables -A INPUT -p tcp --dport 22 -j ACCEPT
iptables -A OUTPUT -p tcp --sport 22 -j ACCEPT
# log dropped packets
ip6tables -A INPUT -j LOG --log-prefix " IN: "
ip6tables -A OUTPUT -j LOG --log-prefix " OUT: "
eend $?
}
stop() {
ebegin "Stopping firewall"
for a in `cat /proc/net/ip_tables_names`; do
/sbin/ip6tables -F -t $a
/sbin/ip6tables -X -t $a
/sbin/iptables -F -t $a
/sbin/iptables -X -t $a
if [ $a == nat ]; then
/sbin/iptables -t nat -P PREROUTING ACCEPT
/sbin/iptables -t nat -P POSTROUTING ACCEPT
/sbin/iptables -t nat -P OUTPUT ACCEPT
elif [ $a == mangle ]; then
/sbin/iptables -t mangle -P PREROUTING ACCEPT
/sbin/iptables -t mangle -P INPUT ACCEPT
/sbin/iptables -t mangle -P FORWARD ACCEPT
/sbin/iptables -t mangle -P OUTPUT ACCEPT
/sbin/iptables -t mangle -P POSTROUTING ACCEPT
elif [ $a == filter ]; then
/sbin/ip6tables -t filter -P INPUT ACCEPT
/sbin/ip6tables -t filter -P FORWARD ACCEPT
/sbin/ip6tables -t filter -P OUTPUT ACCEPT
/sbin/iptables -t filter -P INPUT ACCEPT
/sbin/iptables -t filter -P FORWARD ACCEPT
/sbin/iptables -t filter -P OUTPUT ACCEPT
fi
done
eend $?
}
reload() {
ebegin "Flushing firewall"
for a in `cat /proc/net/ip_tables_names`; do
/sbin/ip6tables -F -t $a
/sbin/ip6tables -X -t $a
done;
eend $?
start
}
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