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Re: DNS TXT field usage ?


From: Joe Provo <nanog-post () rsuc gweep net>
Date: Sun, 28 Mar 2010 08:34:26 -0400

On Sun, Mar 28, 2010 at 02:04:39PM +0200, jul wrote:
Hello,

While watching some parked domains, I recently observed one which has a
TXT field containing some crypto value, something like a ssh key/RSA 512
or 1024 output (only the crypto part 'cvxvcvcxvcxv=' ).

If the TXT data is a large wodge which changes, and/or there are 
fluctuating interesting labels within the zone, then it isn't parked 
but is being used for IP-over-DNS tunneling.

Cheers,

Joe

-- 
             RSUC / GweepNet / Spunk / FnB / Usenix / SAGE


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