Re: Enabling DNS Forwarder causes IM Problem

Hi

One thing I would like to know is do ALL dns queries fail when you configure
this Linux box as the upstream DNS server? or is it JUST IM generated DNS
queries?

Regards

Si

Herb Martin wrote:
Hey guys i just enabled forwarder on our DNS servers and point it to use
our
[quoted text clipped - 6 lines]
The simpler answer is to have your DNS forwarders set to your ISP's DNS
servers, not your Linux box.

That may be simplest but it is not (always) the most secure and is typically
not the most efficient as opposed to his doing it with the gateway to the
Internet (his linux box).

[It also may not be POSSIBLE since a truly secure setup would usually
prevent any critical internal servers (DNS or DCs) from going through the
firewall.]

One useful addition to your idea may be to TRY this at least temporarily
to determine if the problem is with the Linux DNS Server.

Gabriel already suggested making sure that the Linux box was actually
RUNNING a DNS Server (and I am not sure that I would have remembered
to suggest that <grin>).

Another problem might be that the Linux server is running DNS but not
servicing the INTERNAL NIC, or perhaps is NOT configured to either
forward (to another DNS like the ISP) or to do the actual Recursion.

Many publicly located DNS Servers do in fact disable recursion and
forwarding with the intent to ONLY provide DNS resolution of the
zone for which they are authoritative.


--
Message posted via WinServerKB.com
http://www.winserverkb.com/Uwe/Forums.aspx/windows-server-dns/200705/1

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