[Operators] about srv record

Kevin Smith kevin at kismith.co.uk
Tue Aug 16 08:47:35 UTC 2011


On Mon, Aug 15, 2011 at 8:44 AM, Dave Cridland <dave at cridland.net> wrote:
> On Sat Aug 13 23:34:56 2011, Josemar Müller Lohn wrote:
>>> Is it valid to so:
>>> _xmpp-client._tcp.alice.com. CNAME _xmpp-client.bob.com.
>>
>> You can only get a CNAME answer when you ask for an A record.
>
> I don't think that's true.
>
> I think it may well choke the resolvers in many XMPP implementations, mind,
> but I think it ought to work according to the specifications. A CNAME merely
> states to restart the resolution using the new name.
>
> Specifically, the requirement that a name with a CNAME record MUST NOT have
> any other records (aside from certain DNSSEC ones) would appear to support
> that.

Is this true? My understanding was that the target for an SRV record
explicitly could not be a CNAME, and that the lookup done by XMPP was
explicitly SRV. (That is: I don't believe it's valid)

/K


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