[atlas] IPv6 Doesn't Work

Hi Jiri, 

for me it looks like you're not reachable indeed: 

> pete at charon.net.hindenburgring.com> traceroute inet6 2a00:1028:8d1c:90da:220:4aff:fee0:2026 
> traceroute6 to 2a00:1028:8d1c:90da:220:4aff:fee0:2026 (2a00:1028:8d1c:90da:220:4aff:fee0:2026) from <xxx>, 64 hops max, 12 byte packets
> [...]
>  3  2a00:19e0:ffff:fffc::1 (2a00:19e0:ffff:fffc::1)  23.579 ms  23.308 ms  23.495 ms
>  4  2a00:19e0:ffff:ffff::3 (2a00:19e0:ffff:ffff::3)  29.521 ms  29.738 ms  29.822 ms
>  5  ae0-401.fra10.core-backbone.com (2a01:4a0:1338:2::1)  30.063 ms  29.215 ms  36.436 ms
>  6  ae2-2001.nbg30.core-backbone.com (2a01:4a0:0:2001::1)  32.540 ms  31.789 ms  51.790 ms
>  7  ae1-2053.prg10.core-backbone.com (2a01:4a0:0:2053::22)  37.175 ms  36.355 ms  35.141 ms
>  8  nix4-ipv6.pater.iol.cz (2001:7f8:14::29:1)  39.033 ms  36.891 ms  37.997 ms
>  9  dynamic-2a00-1028-0001-0160-0000-0000-0000-0002.ipv6.broadband.iol.cz (2a00:1028:1:160::2)  38.403 ms  41.560 ms  37.239 ms
> 10  dynamic-2a00-1028-0001-02a5-0000-0000-0000-0002.ipv6.broadband.iol.cz (2a00:1028:1:2a5::2)  37.214 ms  50.273 ms  51.604 ms
> 11  * * *
> 12  dynamic-2a00-1028-8d1c-90d8-0000-0000-0000-0001.ipv6.broadband.iol.cz (2a00:1028:8d1c:90d8::1)  44.291 ms  58.819 ms  49.810 ms
> 13  * * *
> 14  * * *
> 15  * * *
> 16  * * *
> 17  * * *
> 18  * * *
> 19  * * *
> [...]

Are you by any chance filtering ICMPv6 on your ingress router?

Regards, 

  Peter.