nanog mailing list archives

RE: Above.net problems ??


From: Arjan Hulsebos <ahulsebos () corp home nl>
Date: Wed, 26 Nov 2003 18:57:00 +0100

Is there any relationship between this "europeanwide" 
above.net failure and the huge amount of
DNS requests to lockup.zonelabs.com which failed that every 
ISP (at least in France) seem to
have encountered last night ?
The zonelabs.com zone is hosted on Above.net NS servers. 

The Netherlands were hit as well. We saw a massive flood of queries for
lockup.zonelabs.com, too. It performed a nice DoS on our client name
servers.... :-(

You'd think that an unresponsive nameserver would be flagged dead, and such
information be cached. Does anyone know whether that's actually done in Bind
8.3.4? Or perhaps not by default?

Cheers,

Arjan H


Not even a clue-by-four would work with this clown.
________________________________
dr. Arjan Hulsebos
Security Engineer
Essent Kabelcom, @Home Benelux department
1042 AX Amsterdam
Email: arjanh () corp home nl
Tel:   +31 20 88 55 407
Mob:   +31 6 21 548 777


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