[nsp-sec] Got traffic?

Florian Weimer fweimer at bfk.de
Fri Jul 17 04:45:21 EDT 2009


* Nicholas Ianelli:

> Are folks seeing lots of requests destined to any of these IP addresses
> (UDP based):
>
> 156.154.100.3
> 156.154.101.3
> 156.154.102.3
> 156.154.103.3

Are you seeing legitimately-looking DNS requests?  There are some
delegations looping back to ns*.nic.uk, which could lead resolvers
astray (e.g. arkselfstorage.co.uk, growthengine.co.uk).  This could
lead to issues if one of them is a popular domain.  BIND caches the
resolution failure quite agressively (because the zone isn't signed),
but other resolvers might not do this.

-- 
Florian Weimer                <fweimer at bfk.de>
BFK edv-consulting GmbH       http://www.bfk.de/
Kriegsstraße 100              tel: +49-721-96201-1
D-76133 Karlsruhe             fax: +49-721-96201-99



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