[Pdns-users] CNAME recursion

Radek Hladik pdns-user.conf at bearbone.twobears.cz
Sun Aug 8 16:43:38 UTC 2004

Derrik Pates wrote:

> Radek Hladik wrote:
>> So I wanna ask is this normal behavior? I can turn skip_cname to yes 
>> and let the client to do the resolving but I think that the server 
>> should do this.
> If the server is an authoritative server, and isn't set up to do 
> recursion (and a proper authoritative server _really_ ought not be doing 
> recursion anyway), then no, it will not and should not dereference the 
> CNAME for the client. Any proper DNS client library will definitely try 
> to resolve the target of the CNAME on its own. It's not the server's 
> job, particularly if the target of the CNAME falls outside its scope of 
> authority (I.e., it's not an authoritative server for the zone that the 
> target exists in). If the server happens to know it, it should by RFC 
> definition append the appropriate records to its answer section; but the 
> reply is still perfectly valid if it doesn't.
Ok, but why it returns 'non-exist' when it cannot find the CNAME target? 
I would suppose it will always return the CNAME record and eventually 
the dereferenced target.

Radek Hladik

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