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| Subject: | RE: DNS cache poisoning? |
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| Date: | Wed, 17 Aug 2005 10:03:23 -0400 |
This appears to be related to a well known issue. Windows DNS is subject to cache poisoning if forwarding to BIND 4 and 8 servers, which do not properly scrub data. Forwarding to BIND 9 should work OK because BIND 9 works properly. So "dump Windows DNS and use BIND" does not adequately cover the issue. See: http://isc.sans.org/diary.php?date=2005-04-07 http://support.microsoft.com/default.aspx?scid=kb;en-us;241352 http://support.microsoft.com/kb/316786
From KB241352, for NT4 SP4 or later:
1. Start Registry Editor (Regedt32.exe). 2. Locate the following key in the registry: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\DNS\Parameters 3. On the Edit menu, click Add Value, and then add the following registry value: Value Name: SecureResponses Data Type: REG_DWORD Value: 1 (To eliminate non-secure data) 4. Quit Registry Editor
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