Re: DNS Event 5504
From: Kevin D. Goodknecht Sr. [MVP] (admin_at_nospam.WFTX.US)
Date: 12/01/04
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Date: Wed, 1 Dec 2004 11:47:32 -0600
In news:46B207F5-51C4-4F72-8403-9BC6664781AF@microsoft.com,
sktech <sktech@discussions.microsoft.com> commented
Then Kevin replied below:
> I am receiving invalid packet messages in my DNS Log.
> They seem to be coming from Doubleclick name servers. I
> have DNS cache pollution checked on my server and in the
> forwarders tab there is "all other DNS domains". How can
> I prevent this traffic? Running W2K3.
This has come up on these DNS servers a lot(doubleclick.net) I have been
recommending that people block these servers at the firewall because
doubleclick.net is a known ad ware site. So you won't miss much, except ads.
That said, it is possible that this is a EDNS issue, if you have a firewall
that blocks UDP packets over 512 bytes, such as a Pix firewall. If you have
a Pix firewall, check with the Cisco website on fixing the firewall to allow
UDP packets up to the MTU of your internet link. (Normally 1500 bytes) UDP
is more efficient and requires less overhead than TCP.
828731 - An External DNS Query May Cause an Error Message in Windows Server
2003
http://support.microsoft.com/default.aspx?scid=kb;en-us;828731
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