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Date:      Sat, 29 Jan 2000 17:46:54 +0100
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        "Michael Bryan" <fbsd-security@ursine.com>
Cc:        freebsd-security@FreeBSD.ORG
Subject:   Re: Continual DNS requests from mysterious IP 
Message-ID:  <13429.949164414@critter.freebsd.dk>
In-Reply-To: Your message of "Sat, 29 Jan 2000 08:42:46 PST." <200001290842460680.22E3EFC9@quaggy.ursine.com> 

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In message <200001290842460680.22E3EFC9@quaggy.ursine.com>, "Michael Bryan" wri
tes:
>
>
>On 1/29/00 at 8:34 AM Samara McCord wrote:
>
>>But this also brings up my other
>>point.  Correct me if I'm wrong, but my DNS servers shouldn't ever have
>>to deliver the MX records for aol.com (or any domain for which I don't
>>serve), except to my own internal machines and for my own customers, right?
>
>If somebody has manually setup their system to use you as a DNS resolver,
>then you will get packets for any and all DNS requests they make, no matter
>where they are on the Internet.  Not a very smart way to do things, mind
>you, but I've seen it before, usually from customers of mine who moved a
>computer from work or another ISP and kept their old DNS settings.  I don't
>think that's what's going on in your case, though...

Tell named to only recurse for your own IP range (takes code hacking).

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!


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