intermittent resolving problem for some domains

[Daniel Dawalibi]

Hello

I am able to reach the root servers and I can resolve other domains.



; <<>> DiG 9.8.0 <<>> . ns
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32217
;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.                              IN      NS

;; ANSWER SECTION:
.                       518187  IN      NS      i.root-servers.net.
.                       518187  IN      NS      d.root-servers.net.
.                       518187  IN      NS      g.root-servers.net.
.                       518187  IN      NS      f.root-servers.net.
.                       518187  IN      NS      m.root-servers.net.
.                       518187  IN      NS      h.root-servers.net.
.                       518187  IN      NS      j.root-servers.net.
.                       518187  IN      NS      c.root-servers.net.
.                       518187  IN      NS      b.root-servers.net.
.                       518187  IN      NS      l.root-servers.net.
.                       518187  IN      NS      e.root-servers.net.
.                       518187  IN      NS      a.root-servers.net.
.                       518187  IN      NS      k.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.     604587  IN      A       198.41.0.4
a.root-servers.net.     604603  IN      AAAA    2001:503:ba3e::2:30
b.root-servers.net.     604587  IN      A       192.228.79.201
c.root-servers.net.     604587  IN      A       192.33.4.12
d.root-servers.net.     604767  IN      A       199.7.91.13
d.root-servers.net.     604767  IN      AAAA    2001:500:2d::d
e.root-servers.net.     604587  IN      A       192.203.230.10
f.root-servers.net.     604587  IN      A       192.5.5.241
f.root-servers.net.     604587  IN      AAAA    2001:500:2f::f
g.root-servers.net.     604587  IN      A       192.112.36.4
h.root-servers.net.     604587  IN      A       128.63.2.53
h.root-servers.net.     604587  IN      AAAA    2001:500:1::803f:235
i.root-servers.net.     604765  IN      A       192.36.148.17
i.root-servers.net.     604765  IN      AAAA    2001:7fe::53

;; Query time: 2 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Feb 19 16:38:34 2014
;; MSG SIZE  rcvd: 512



Best Regards,
Daniel Dawalibi
-----Original Message-----
From: Niall O'Reilly [mailto:niall.oreilly at ucd.ie] 
Sent: Wednesday, February 19, 2014 1:22 PM
To: Daniel Dawalibi
Cc: bind-users at lists.isc.org
Subject: Re: intermittent resolving problem for some domains

At Wed, 19 Feb 2014 00:33:11 +0200,
Daniel Dawalibi wrote:
> 
> Kindly note that the number of recursive clients is increasing during 
> the problem : recursive clients: 3700/14900/15000

  I think it's likely that you have a connectivity problem.

  I'ld suggest checking whether your server which is giving these
  messages can reach any of the root servers or even any of the
  external Internet.

  Best regards,
  Niall O'Reilly