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 :: Mailing Lists

[ILUG] DNS resolution problem

[ILUG] DNS resolution problem

Thomas Pedoussaut thomas at staffeurs.org
Mon Feb 28 11:32:29 GMT 2011


Be sure to add options ndots:1 (or 2) in your resolv.conf

On 28/02/11 08:44, stephen mulcahy wrote:
> Hi,
>
> Has anyone had any problems on Ubuntu or Debian with DNS resolution? 
> In particular, has anyone seen their systems generating lots of 
> unneccesary queries? Specifically, I have systems configured with the 
> following resolv.conf (actual values changed)
>
> domain blah.example.com
> search foo.example.com aaa.example.com
> nameserver 10.0.0.1
> nameserver 10.0.0.2
>
> What I'm seeing in the nameserver query logs is lots of queries for 
> things like
>
> www.google.com.foo.example.com
> www.google.come.aaa.example.com
> www.google.com.blah.example.com
>
> My expectation of the above DNS config is that it would first try to 
> use www.google.com and only tries things like 
> www.google.com.foo.example.com if the initial queried name didn't 
> contain any dots or www.google.com didn't resolve.
>
> Is my understanding wrong here? Has anyone else seen similar problems?
>
> Thanks for any thoughts.
>
> -stephen
>



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