IPv6 foot-dragging

Fri May 13 02:09:06 UTC 2011

Anthony Francis - Handy Networks LLC wrote:
> I can confirm full IPV6 connectivity from HE.

I'm using the HE tunnel also and it works fine.

But I have a bit of difficulty getting the right ip6tables (and the 
single iptables) rules to work so that my one server that tunnels ipv6 
can serve as a gateway server.

I used http://madduck.net/docs/ipv6/ as a guide.

Using tcpdump I can see a ping from a server behind the gateway going to 
the gateway server and the gateway server sends it to the tunnel, but 
nothing's coming back.

i.e.:

behind gateway:

# ping6 2620:0:2d0:200::10
PING 2620:0:2d0:200::10(2620:0:2d0:200::10) 56 data bytes
^C
--- 2620:0:2d0:200::10 ping statistics ---
392 packets transmitted, 0 received, 100% packet loss, time 391484ms

gateway:

# tcpdump -t -n -s 512 -vv ip6 or proto ipv6
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 
512 bytes
IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 
2001:470:85cd:0:20c:6eff:fed2:1947 > 2620:0:2d0:200::10: [icmp6 sum ok] 
ICMP6, echo request, length 64, seq 317
IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 
2001:470:85cd:0:20c:6eff:fed2:1947 > 2620:0:2d0:200::10: [icmp6 sum ok] 
ICMP6, echo request, length 64, seq 318
IP6 (hlim 64, next-header ICMPv6 (58) payload length: 64) 
2001:470:85cd:0:20c:6eff:fed2:1947 > 2620:0:2d0:200::10: [icmp6 sum ok] 
ICMP6, echo request, length 64, seq 319

Anything obvious I might have missed? Can post more specifics later if 
needed.

Thanks,
Jeroen

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