[Ext] Re: G root not responding on UDP?

Thu Apr 14 11:40:05 UTC 2016

fyi,

some discussion and below link from the bind mailing list on this

https://atlas.ripe.net/dnsmon/group/g-root


On 4/14/2016 7:36 AM, Nicholas Suan wrote:
> I'm see the same thing from multiple networks.
>
> $ dig  NS . @g.root-servers.net
>
> ; <<>> DiG 9.9.5 <<>> NS . @g.root-servers.net
> ;; global options: +cmd
> ;; connection timed out; no servers could be reached
>
> On Thu, Apr 14, 2016 at 7:30 AM, Anurag Bhatia <me at anuragbhatia.com> wrote:
>> Hello everyone
>>
>>
>> I wonder if it's just me or anyone else also finding issues in g root
>> reachability?
>>
>>
>> ICMP, trace, UDP DNS queries all timing out. Only TCP seem to work.
>>
>>
>> Trace is timing out on 208.46.37.38.
>>
>>
>>
>> traceroute to 192.112.36.4 (192.112.36.4), 64 hops max, 52 byte packets
>>   1  router01.home (172.16.0.1)  4.926 ms  1.863 ms  1.845 ms
>>   2  103.60.176.101 (103.60.176.101)  24.007 ms  24.507 ms  22.330 ms
>>   3  nsg-static-137.49.75.182-airtel.com (182.75.49.137)  64.435 ms  64.359
>> ms  66.108 ms
>>   4  182.79.206.46 (182.79.206.46)  331.787 ms
>>      182.79.206.53 (182.79.206.53)  228.497 ms
>>      182.79.222.189 (182.79.222.189)  224.966 ms
>>   5  ldn-brdr-01.qwest.net (195.66.225.34)  162.745 ms  162.139 ms  162.031
>> ms
>>   6  lon-ddos-01.inet.qwest.net (67.14.63.58)  162.138 ms  162.125 ms
>>   162.916 ms
>>   7  * * *
>>   8  chp-edge-01.inet.qwest.net (208.46.37.37)  242.819 ms  242.793 ms
>>   242.575 ms
>>   9  208.46.37.38 (208.46.37.38)  253.176 ms  253.066 ms  252.807 ms
>> 10  * * *
>> 11  * * *
>> 12  * * *
>>
>>
>>
>>
>> dig @192.112.36.4 . ns
>>
>> ; <<>> DiG 9.8.3-P1 <<>> @192.112.36.4 . ns
>> ; (1 server found)
>> ;; global options: +cmd
>> ;; connection timed out; no servers could be reached
>>
>>
>>
>>
>>
>> dig @192.112.36.4 . ns  +tcp +noauth
>>
>> ; <<>> DiG 9.8.3-P1 <<>> @192.112.36.4 . ns +tcp +noauth
>> ; (1 server found)
>> ;; global options: +cmd
>> ;; Got answer:
>> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29674
>> ;; flags: qr aa rd; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 24
>> ;; WARNING: recursion requested but not available
>>
>> ;; QUESTION SECTION:
>> ;. IN NS
>>
>> ;; ANSWER SECTION:
>> . 518400 IN NS g.root-servers.net.
>> . 518400 IN NS l.root-servers.net.
>> . 518400 IN NS f.root-servers.net.
>> . 518400 IN NS h.root-servers.net.
>> . 518400 IN NS k.root-servers.net.
>> . 518400 IN NS b.root-servers.net.
>> . 518400 IN NS c.root-servers.net.
>> . 518400 IN NS e.root-servers.net.
>> . 518400 IN NS j.root-servers.net.
>> . 518400 IN NS i.root-servers.net.
>> . 518400 IN NS m.root-servers.net.
>> . 518400 IN NS a.root-servers.net.
>> . 518400 IN NS d.root-servers.net.
>>
>> ;; ADDITIONAL SECTION:
>> a.root-servers.net. 3600000 IN A 198.41.0.4
>> b.root-servers.net. 3600000 IN A 192.228.79.201
>> c.root-servers.net. 3600000 IN A 192.33.4.12
>> d.root-servers.net. 3600000 IN A 199.7.91.13
>> e.root-servers.net. 3600000 IN A 192.203.230.10
>> f.root-servers.net. 3600000 IN A 192.5.5.241
>> g.root-servers.net. 3600000 IN A 192.112.36.4
>> h.root-servers.net. 3600000 IN A 198.97.190.53
>> i.root-servers.net. 3600000 IN A 192.36.148.17
>> j.root-servers.net. 3600000 IN A 192.58.128.30
>> k.root-servers.net. 3600000 IN A 193.0.14.129
>> l.root-servers.net. 3600000 IN A 199.7.83.42
>> m.root-servers.net. 3600000 IN A 202.12.27.33
>> a.root-servers.net. 3600000 IN AAAA 2001:503:ba3e::2:30
>> b.root-servers.net. 3600000 IN AAAA 2001:500:84::b
>> c.root-servers.net. 3600000 IN AAAA 2001:500:2::c
>> d.root-servers.net. 3600000 IN AAAA 2001:500:2d::d
>> f.root-servers.net. 3600000 IN AAAA 2001:500:2f::f
>> h.root-servers.net. 3600000 IN AAAA 2001:500:1::53
>> i.root-servers.net. 3600000 IN AAAA 2001:7fe::53
>> j.root-servers.net. 3600000 IN AAAA 2001:503:c27::2:30
>> k.root-servers.net. 3600000 IN AAAA 2001:7fd::1
>> l.root-servers.net. 3600000 IN AAAA 2001:500:9f::42
>> m.root-servers.net. 3600000 IN AAAA 2001:dc3::35
>>
>> ;; Query time: 259 msec
>> ;; SERVER: 192.112.36.4#53(192.112.36.4)
>> ;; WHEN: Thu Apr 14 16:59:09 2016
>> ;; MSG SIZE  rcvd: 744
>>
>>
>>
>>
>>
>> Is UDP blocked recently or it has been like this from long?
>>
>>
>>
>> --
>>
>>
>> Anurag Bhatia
>> anuragbhatia.com