Ipv6 dns issues ??

[bhaveshmital]

I have a 6rd setup in my router
most sites like ipv6.google.com work fine.
but sites like www.whitehouse.gov does not work fine.
See the mtr report below

sudo mtr -r -c 1 www.whitehouse.gov
Start: Sat Jan 10 16:48:11 2015
HOST: xyz Loss% Snt Last Avg Best Wrst StDev
1.|-- 219b-68ef-ff72-edae-029b- 0.0% 1 8.6 8.6 8.6 8.6 0.0
2.|-- cust-gw.ipv6.sonic.net 0.0% 1 26.2 26.2 26.2 26.2 0.0
3.|-- 201.ge-6-1-1.gw.equinix-s 0.0% 1 24.5 24.5 24.5 24.5 0.0
4.|-- 0.xe-7-0-0.gw.pao1.sonic. 0.0% 1 27.2 27.2 27.2 27.2 0.0
5.|-- ??? 100.0 1 0.0 0.0 0.0 0.0 0.0

[bhaveshmital]

Here is the output of traceroute as well

traceroute -6 www.whitehouse.gov

1 * * *
2 * * *
3 * * *
4 0.xe-7-0-0.gw.pao1.sonic.net (2001:5a8:5:3::2) 68.287 ms 68.313 ms 68.311 ms
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *

[nsmiller]

My trace:

C:\utils\dig>tracert www.whitehouse.gov

Tracing route to a1128.dsch.akamai.net [2001:590:1:704::c690:6418]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 1000-0000-0000-0000-09d7-04ed-a420-2062.6rd.ip6.sonic.net [2602:24a:de40:7d90::1]
2 21 ms 22 ms 21 ms cust-gw.ipv6.sonic.net [2602:24b:8179:10::1]
3 21 ms 22 ms 21 ms 201.ge-6-1-1.gw.equinix-sj.sonic.net [2001:5a8:5:e::1]
4 23 ms 33 ms 22 ms 0.xe-7-0-0.gw.pao1.sonic.net [2001:5a8:5:3::2]
5 27 ms 24 ms 24 ms xe-1-0-6.ar1.pao1.us.as4436.gtt.net [2001:590::4516:8255]
6 23 ms 22 ms 22 ms ae0-110g.cr1.pao1.us.as4436.gtt.net [2001:590::4516:9912]
7 23 ms 22 ms 23 ms ae1-70g.cr1.sjc1.us.as4436.gtt.net [2001:590::4516:8fa5]
8 23 ms 24 ms 23 ms 2001:590:1:704::c690:6418

Trace complete.

What DNS servers are you using?

[bhaveshmital]

I am using the ones listed on the sonic.net https://wiki.sonic.net/wiki/List_of_rec ... NS_servers
208.201.224.11

208.201.224.33

[nsmiller]

Okay. When I remove the IPv6 DNS servers from my router, I fail http://test-ipv6.com with 9/10, and a warning that the IPv4 DNS servers, same pair as you use, have no access to the IPv6 Internet.

The IPv4 DNS servers do return AAAA records:

C:\utils\dig>nslookup www.google.com 208.201.224.11
Server: ns1.sonic.net
Address: 208.201.224.11

Non-authoritative answer:
Name: www.google.com
Addresses: 2607:f8b0:4007:804::1010
74.125.224.112
74.125.224.116
74.125.224.113
74.125.224.114
74.125.224.115

So I don't know what is going on there.

Trace route is failing, today; but possibly due to anti-DDoS measures being taken by Akamai. The site, www.whitehouse.gov, is working for me.

[kgc]

It is true that the name server clusters that handle 208.201.224.11/33 do not have v6 connectivity so would not be able to resolve a record that only had v6 authoritative servers.

[V6guest]

Dear Reader,

If your looking for a backup dns server.
please see link

IPV6 SANDBOX
The World’s First IPv6-compliant Open Recursive DNS Service

https://www.opendns.com/about/innovations/ipv6/

2620:0:ccc::2
2620:0:ccd::2

If you want to take a class about dns

please see link

https://samsclass.info/40/40_S15.shtml

good luck
v6guest