Some hosts not resolving from No-IP by our DNS servers
Josh Kuo
josh.kuo at gmail.com
Wed Mar 9 18:37:37 UTC 2011
If I am not mistaken, when you do +trace, the trace actually comes
from your machine running 'dig', and not the DNS resolver itself.
(Others on list please correct me)
Can you perform the same 'dig' query from the DNS server, without
specifying which resolver to use? This smells like the DNS server
itself is having trouble communicating to the outside.
I would start from there to make sure the DNS server itself can
resolve these names. Also make sure recursion is enabled.
On Wednesday, March 9, 2011, Frank Pikelner
<Frank.Pikelner at netcraftcommunications.com> wrote:
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> Hello,
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> I'm having a problem resolving several hosts from NO-IP. When I attempt to resolve them from our DNS servers I get no reply (we can resolve other hosts). I'm not certain why the resolution stops. If I force a resolution using external DNS servers using dig (i.e. Google 8.8.8.8) the hosts resolve without problem. Here is the trace from our DNS server:
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> dig oa.in-ip.info +trace
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> ; <<>> DiG 9.6-ESV-R1 <<>> oa.in-ip.info +trace
> ;; global options: +cmd
> . 25973 IN NS j.root-servers.net.
> . 25973 IN NS e.root-servers.net.
> . 25973 IN NS m.root-servers.net.
> . 25973 IN NS k.root-servers.net.
> . 25973 IN NS b.root-servers.net.
> . 25973 IN NS d.root-servers.net.
> . 25973 IN NS f.root-servers.net.
> . 25973 IN NS g.root-servers.net.
> . 25973 IN NS h.root-servers.net.
> . 25973 IN NS c.root-servers.net.
> . 25973 IN NS i.root-servers.net.
> . 25973 IN NS a.root-servers.net.
> . 25973 IN NS l.root-servers.net.
> ;; Received 436 bytes from 127.0.0.1#53(127.0.0.1) in 1 ms
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> info. 172800 IN NS d0.info.afilias-nst.org.
> info. 172800 IN NS b2.info.afilias-nst.org.
> info. 172800 IN NS b0.info.afilias-nst.org.
> info. 172800 IN NS a0.info.afilias-nst.info.
> info. 172800 IN NS a2.info.afilias-nst.info.
> info. 172800 IN NS c0.info.afilias-nst.info.
> ;; Received 434 bytes from 192.58.128.30#53(j.root-servers.net) in 230 ms
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> info. 900 IN SOA a0.info.afilias-nst.info. noc.afilias-nst.info. 2009263081 3600 1800 604800 3600
> ;; Received 91 bytes from 199.249.113.1#53(a2.info.afilias-nst.info) in 3 ms
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> Would appreciate any pointers.
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> Thank you,
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> Frank
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