Problem with some domains and some domain resolved
bortzmeyer at nic.fr
Tue Jul 10 15:19:20 UTC 2007
On Tue, Jul 10, 2007 at 05:29:58PM +0300,
Nayeem <nayeem at ksa.zajil.com> 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.
> > www.cnn.com
> Server: 127.0.0.1
> Address: 127.0.0.1#53
> ** server can't find www.cnn.com: SERVFAIL
What software does 127.0.0.1 run? BIND, of course, but which one? Can
you go to CNN's name servers directly:
dig @twdns-01.ns.aol.com. ANY cnn.com
If no, use ping and traceroute to see if it is a network problem.
> > www.google.com
> ;; connection timed out; no servers could be reached
> 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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