On 2006-12-20, Asfand Yar Qazi <ayqazi@xxxxxxxxx> wrote: > I have an ipv6 tunnel on the device 'tunbt6', and another interface on > eth0 to the rest of my network. > > When I enter the following commands: > > ip6tables -N filter6 > ip6tables -A filter6 -m state --state NEW -i ! tunbt6 -j ACCEPT > ip6tables -A filter6 -m state --state ESTABLISHED,RELATED -j ACCEPT > ip6tables -A filter6 -j REJECT > > ip6tables -A INPUT -j filter6 > ip6tables -A FORWARD -j filter6 > > > It doesn't work! I can't even ping6 the machine over eth0 from my > other computer connected to the same ethernet segment! > IP6 uses ICMP6 for link level address resolution (like IP4 uses ARP). Therefore you need to accept NEW icmp6 packets. At least some types. Read draft-ietf-v6ops-icmpv6-filtering-bcp-01.txt (can be found on IETF FTP server) for more detailes. -- Petr
