Adding IPv6 breaks StackExchange

Question

I added IPv6 on my Ubuntu 14.04.3 LTS laptop by adding an OpenVPN tunnel to my Ubuntu 14.04.3 LTS server that has IPv6. I am using masquerading on both IPv6 and IPv4.

Using StackExchange used to have a regularly updated count of updated/new questions where I could click and have them loaded without reloading the whole page. Now it is no longer there.

I do not see any AAAA records for a few StackExchange hosts I checked.

laptop2/stackex /home/stackex 1> a unix.stackexchange.com
unix.stackexchange.com. 300 in  a   104.16.119.182
unix.stackexchange.com. 300 in  a   104.16.117.182
unix.stackexchange.com. 300 in  a   104.16.118.182
unix.stackexchange.com. 300 in  a   104.16.115.182
unix.stackexchange.com. 300 in  a   104.16.116.182
laptop2/stackex /home/stackex 2> aaaa unix.stackexchange.com
laptop2/stackex /home/stackex 3> aaaa linuxhomepage.com
linuxhomepage.com.  21600   in  aaaa    2a02:348:61:5d75::a
linuxhomepage.com.  21600   in  aaaa    2a02:348:61:5d75::b
linuxhomepage.com.  21600   in  aaaa    2a02:348:61:5d75::c
linuxhomepage.com.  21600   in  aaaa    2a02:348:61:5d75::d
linuxhomepage.com.  21600   in  aaaa    2a02:348:61:5d75::e
linuxhomepage.com.  21600   in  aaaa    2a02:348:61:5d75::f
laptop2/stackex /home/stackex 4>

Any idea what I broke?

Yes, this seems strange, so I am wondering.

Would you add more details, masquerading/routing/vpn rules? – Rui F Ribeiro Jan 01 '16 at 13:20 — Rui F Ribeiro, Jan 01 '16 at 13:20

score 1 · Answer 1 · edited Jan 01 '16 at 14:17

1

All those sites that dont show ipv6 address will have this problem. May be stack-exchange is not running on IPV6:

root@ijaz-HP-EliteBook-8560p:~# host www.google.com
www.google.com has address 216.58.210.68
www.google.com has IPv6 address 2a00:1450:4009:811::2004

root@ijaz-HP-EliteBook-8560p:~# host www.ncp.edu.pk
www.ncp.edu.pk has address 111.68.96.165
www.ncp.edu.pk has IPv6 address 2400:fc00:854a:aaaa:700d:d110:e593:8d00

root@ijaz-HP-EliteBook-8560p:~# host stackexchange.com
stackexchange.com has address 104.16.116.182
stackexchange.com has address 104.16.119.182
stackexchange.com has address 104.16.118.182
stackexchange.com has address 104.16.115.182
stackexchange.com has address 104.16.117.182

why it is not showing any ipv6 address.

edited Jan 01 '16 at 14:17

muru

72,889

answered Jan 01 '16 at 13:31

Ijaz Ahmad

7,202

Excellent point, modding you up. – Rui F Ribeiro Jan 01 '16 at 14:11
1

i had faced this problem with github.com – Ijaz Ahmad Jan 01 '16 at 14:31
This does not provide an answer to the question. – kasperd Jan 17 '16 at 12:05

Adding IPv6 breaks StackExchange

1 Answers1