Re: ip6tables problem

["Asfand Yar Qazi" <ayqazi@gmail.com>]

On 12/20/06, Petr Pisar <xpisar@fi.muni.cz> wrote:
> On 2006-12-20, Asfand Yar Qazi <ayqazi@gmail.com> wrote:
> > On 12/20/06, Petr Pisar <xpisar@fi.muni.cz> wrote:
> >> On 2006-12-20, Asfand Yar Qazi <ayqazi@gmail.com> 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.
> >>
> >
> > I'll just let in all icmp6 packets.  Now to figure out how to do that...
> >
> ip6tables -I filter6 -p icmpv6 -j ACCEPT
Yep, figured that out, thanks :-)