G root not responding on UDP?

Thu Apr 14 11:30:22 UTC 2016

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