Re: [dnsext] SRV and wildcard CNAME

[Phillip Hallam-Baker <[e-mail]>]

It does indeed. And worse, it works for

_null._random.example.com  SRV...

And other non existent protocols.

There is a way to fix the issue. Instead of resolving in a single step, a
two step resolution is performed. The first step being for an unprefixed
name. This will result in either 'not found' or a canonical name being
returned. The prefix is applied to the canonical name in the second phase.


On Thu, Feb 17, 2011 at 9:51 PM, Masataka Ohta <
[e-mail]> wrote:

> Mark Andrews wrote:
>
> > this include "www.example.net CNAME example.net".
>
> That's a problem. But...
>
> > Additionally people are too lazy to add records for each virtual
> > service in the DNS so they use "* CNAME server" which makes using
> > SRV hard as it requires prepended labels.
>
> Doesn't it mean:
>
>        *.example.com    CNAME srv.example.com
>        srv.example.com  SRV   Priority Weight Port Target
>
> works as:
>
>        _http._tcp.www.example.com SRV  Priority Weight Port Target
>
> ?
>                                                 Masataka Ohta
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>



-- 
Website: http://hallambaker.com/

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