3 # default policy is DROP
9 -A INPUT -i eth0 -p 50 -j ACCEPT
10 -A OUTPUT -o eth0 -p 50 -j ACCEPT
13 -A INPUT -i eth0 -p udp --sport 500 --dport 500 -j ACCEPT
14 -A OUTPUT -o eth0 -p udp --dport 500 --sport 500 -j ACCEPT
17 -A INPUT -i eth0 -p udp --sport 4500 --dport 4500 -j ACCEPT
18 -A OUTPUT -o eth0 -p udp --dport 4500 --sport 4500 -j ACCEPT
20 # allow last UDP fragment
21 -A INPUT -i eth0 -p udp -m frag --fraglast -j ACCEPT
23 # allow ICMPv6 neighbor-solicitations
24 -A INPUT -p icmpv6 --icmpv6-type neighbor-solicitation -j ACCEPT
25 -A OUTPUT -p icmpv6 --icmpv6-type neighbor-solicitation -j ACCEPT
27 # allow ICMPv6 neighbor-advertisements
28 -A INPUT -p icmpv6 --icmpv6-type neighbor-advertisement -j ACCEPT
29 -A OUTPUT -p icmpv6 --icmpv6-type neighbor-advertisement -j ACCEPT
32 -A INPUT -j LOG --log-prefix " IN: "
33 -A OUTPUT -j LOG --log-prefix " OUT: "