01.02.2012 21:12, Eric W. Bates пишет: > On 2/1/2012 3:06 AM, Doug Barton wrote: >> If it's a hurricane electric tunnel don't you want protocol 41? > > Well, it's a straight up gif. Right this second I'm trying to suss out > which protocol gif's use. If it's documented, I can't find it. The > closest bit I can find on the man page is: > > The behavior of gif is mainly based on RFC2893 IPv6-over-IPv4 configured > tunnel. > > I tried to read the pertinent parts of the RFC, but it doesn't really > discuss "type" or "protocol". It does talk about some header size issues. > > Since ipfw is obviously blocking something and I can't get a handle on > it with tcpdump, I'm groping for an understanding of the shape of the > gif packets.
Have you tried "tcpdump -i em_vlan5 -nnvvs0 host $he_tun and not tcp and not udp and not icmp" ? I do not use IPv6 over IPv4 tunnels and not sure. Perhaps, that is IPIP protocol (number 94 decimal)? Eugene Grosbein _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
