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Re: DNS cache poisoning attacks -- are they real?

  • From: Florian Weimer
  • Date: Wed Mar 30 06:38:48 2005

* Brad Knowles:

> At 1:08 PM +0200 2005-03-29, Florian Weimer wrote:
>
>>  BIND accepts non-authoritative answers if their additional section
>>  looks a bit like a referral.  I don't tink that this check is
>>  deliberately lax, but stricter checks are simply harder to do on this
>>  particular code path.
>
> 	BIND explicitly assumes that there might be upstream nameservers 
> you may talk to that may be answering from cache.

Really?  I can't get it to work reliably.  Can you share an example
where delegation to a non-authoritative caching resolver works,
without the need for special seeding of the caching resolver?

Your posts to nanog@merit.edu aren't distributed by the mailing list,
BTW.




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