[outages] WorldNIC/Network Solutions DNS or network issues?
Jeremy Chadwick
jdc at koitsu.org
Thu May 16 00:50:39 EDT 2013
Came across this one right now (21:48 PDT (UTC-0700)) while trying to
look up some tracking information on an Ontrac package I have. Ontrac
uses WorldNIC/Netsol as their authoritative nameservers.
I wasn't able to resolve www.ontrac.com from my Comcast connection at
home (Mountain View, CA), while I saw intermittent DNS failures when
trying to do resolution from my VPS (Sylmar, CA), so I poked at things a
bit. First from my VPS:
$ host www.ontrac.com
www.ontrac.com has address 12.38.237.1
Host www.ontrac.com not found: 3(NXDOMAIN)
And now from home:
$ host www.ontrac.com
;; connection timed out; no servers could be reached
$ dig @a.gtld-servers.net ns ontrac.com
; <<>> DiG 9.8.4-P2 <<>> @a.gtld-servers.net ns ontrac.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33697
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;ontrac.com. IN NS
;; AUTHORITY SECTION:
ontrac.com. 172800 IN NS ns89.worldnic.com.
ontrac.com. 172800 IN NS ns90.worldnic.com.
;; ADDITIONAL SECTION:
ns89.worldnic.com. 172800 IN A 205.178.190.45
ns90.worldnic.com. 172800 IN A 206.188.198.45
;; Query time: 97 msec
;; SERVER: 192.5.6.30#53(192.5.6.30)
;; WHEN: Wed May 15 21:38:12 2013
;; MSG SIZE rcvd: 107
$ dig @205.178.190.45 any www.ontrac.com
; <<>> DiG 9.8.4-P2 <<>> @205.178.190.45 any www.ontrac.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
$ dig @205.188.198.45 any www.ontrac.com
; <<>> DiG 9.8.4-P2 <<>> @205.188.198.45 any www.ontrac.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
$ mtr 205.178.190.45
Packets Pings
Host Loss% Snt Rcv Last Avg Best Wrst
1. gw.home.lan 0.0% 11 11 0.3 0.3 0.2 0.4
2. c-67-180-84-1.hsd1.ca.comcast.net 0.0% 11 11 30.1 22.8 14.0 30.1
3. te-0-0-0-12-ur05.santaclara.ca.sfba.comcast 0.0% 11 11 9.3 10.3 9.3 11.2
4. te-1-1-0-13-ar01.sfsutro.ca.sfba.comcast.ne 0.0% 11 11 15.2 13.3 10.6 15.8
5. he-1-5-0-0-cr01.sanjose.ca.ibone.comcast.ne 0.0% 11 11 21.0 21.7 20.5 23.6
6. er1-tengig2-4.sanjoseequinix.savvis.net 0.0% 11 11 12.9 13.0 11.9 14.1
7. 206.28.98.70 0.0% 11 11 14.5 19.2 11.8 80.0
8. cr2-tengig0-7-3-0.sanfrancisco.savvis.net 0.0% 11 11 14.7 21.6 14.7 63.0
9. cr1-ten-0-13-1-0.dck.savvis.net 0.0% 11 11 91.6 91.6 90.0 94.1
10. hr1-tengig-2-0-0.sterling2dc2.savvis.net 0.0% 11 11 92.1 90.9 90.2 92.1
11. ???
$ mtr 205.188.198.45
Packets Pings
Host Loss% Snt Rcv Last Avg Best Wrst
1. gw.home.lan 0.0% 11 11 0.4 0.3 0.2 0.4
2. c-67-180-84-1.hsd1.ca.comcast.net 0.0% 11 11 31.3 26.8 16.3 39.3
3. te-0-0-0-12-ur05.santaclara.ca.sfba.comcast 0.0% 11 11 15.4 12.5 9.8 15.6
4. te-1-1-0-1-ar01.sfsutro.ca.sfba.comcast.net 0.0% 11 11 14.7 15.2 11.4 28.3
5. he-1-7-0-0-cr01.sanjose.ca.ibone.comcast.ne 0.0% 11 11 21.6 19.8 16.2 24.1
6. be-10-pe02.11greatoaks.ca.ibone.comcast.net 0.0% 11 11 16.4 16.7 15.1 19.4
7. 66.185.150.117 0.0% 11 11 16.7 17.2 14.2 32.7
8. bb1-sjg-xe-1-2-0.atdn.net 0.0% 11 11 16.5 16.0 14.5 17.5
9. bb2-ash-xe-0-0-3.atdn.net 0.0% 11 11 86.9 86.8 85.1 90.3
10. pop1-ash-xe-1-0-0.atdn.net 0.0% 11 11 89.0 86.2 84.7 89.0
11. dar1-dtc-xe-1-2-0.atdn.net 0.0% 11 11 87.6 90.0 84.4 105.7
12. gear1-dtc-lag0.net.aol.com 0.0% 11 11 86.0 86.2 84.8 90.1
13. edge4-dtc-ae0-staging.net.aol.com 0.0% 11 11 86.0 90.7 85.1 133.3
14. ???
Obviously I don't have return path traces.
I repeated the digs from my VPS, and they work but only intermittently.
So I'm guessing some kind of GSLB or network interface round-robining
may be impacting things, but only via some routes/paths.
Sorry if I've forgotten some information or a step, doing too many
things at once right now... :-)
--
| Jeremy Chadwick jdc at koitsu.org |
| UNIX Systems Administrator http://jdc.koitsu.org/ |
| Mountain View, CA, US |
| Making life hard for others since 1977. PGP 4BD6C0CB |
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