Problem with some domains and some domain resolved

Stephane Bortzmeyer bortzmeyer at
Tue Jul 10 15:19:20 UTC 2007

On Tue, Jul 10, 2007 at 05:29:58PM +0300,
 Nayeem <nayeem at> wrote 
 a message of 63 lines which said:

> Is it really  DNS problem or network problem.

I do not know but I can send a few free advices.
>  [root at ns1 named]# nslookup

Use dig to debug, nslookup is deprecated and brings its own problems.
> >
> Server:
> Address:
> ** server can't find SERVFAIL

What software does run? BIND, of course, but which one? Can
you go to CNN's name servers directly:

dig ANY

If no, use ping and traceroute to see if it is a network problem.
> >
> ;; connection timed out; no servers could be reached

Same question.
> So please tell  me where to trace this problem.

1) Read the BIND log. This is mandatory.

2) [Much more difficult] Run tcpdump on the name server. Something
like 'tcpdump -n port 53'.

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