SRV query with no domain?

Christopher Cain chris at christophercain.ca
Thu Aug 16 14:42:16 UTC 2012


Of course a dig query will fail without the domain appended.  Dig takes
you query at face value and will not append domains from your search
suffix list like nslookup and ping will.  You ALWAYS have to fully qualify
your requests when using dig.

Chris.

On 12-08-15 3:29 PM, "WBrown at e1b.org" <WBrown at e1b.org> wrote:

>kevin wrote on 08/15/2012 12:52:18 PM:
>
>> I don't believe SRV lookups use the "search" directive in /etc/
>> resolv.conf; I think that's only for A (name-to-address) lookups.
>> But I could be wrong on that...
>
>Using host I was able to do a search for _sip._tcp for the search domain
>on my system (domain changed to example.org):
>
>wbrown at wbrown-D630:~$ host -t srv _sip._tcp
>_sip._tcp.example.org has SRV record 0 0 5060 tandberg-vcse.example.org.
>wbrown at wbrown-D630:~$ host -t srv _sip._tcp.example.org
>_sip._tcp.example.org has SRV record 0 0 5060 tandberg-vcse.example.org.
>
>Dig fails on same query without domain, succeeds if it is included:
>
>wbrown at wbrown-D630:~$ dig +short  _sip._tcp srv
>wbrown at wbrown-D630:~$ dig +short  _sip._tcp.example.org srv
>0 0 5060 tandberg-vcse.example.org.
>
>
>
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