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@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