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Re: [Openvpn-users] Push client DNS queries through the tunnel?


  • Subject: Re: [Openvpn-users] Push client DNS queries through the tunnel?
  • From: Roland Pope <rpope@xxxxxxxxxxxxx>
  • Date: Tue, 05 Sep 2006 16:04:55 +1200

Jed Sheckler wrote:
> 
> 
> On 9/5/06, *Roland Pope* <rpope@xxxxxxxxxxxxx 
> <mailto:rpope@xxxxxxxxxxxxx>> wrote:

>     It's not just an issue of DNS timeouts whereby your tunneled DNS is
>     taking
>     too long to respond and the resolver is falling back to alternate DNS
>     servers?
> 
>     Roland
> 
> 
> Hmm.  I guess that's a possibility.  I am on a very slow satellite link 
> right now where web pages often time out.  This is about where my 
> current knowledge runs into a wall - hence why I'm asking.  :)
> 
> How would one go about testing your theory?
If you run nslookup and query the DNS servers via the tunnel, you will 
get a default DNS timeout of 2 seconds. Try a few different valid names 
to query and see if you get any name server timeouts.
I have also had situations under XP, where the M$ resolver library has 
mis-behaved and I have had to bounce the OpenVPN tunnel as it has failed 
to use my 'Pushed' DNS servers first time up.

Roland
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