DNS Amplification attack?

Florian Weimer fweimer at bfk.de
Thu Jan 22 14:46:25 UTC 2009

* Mark Andrews:

> 	Authoritative servers need a cache.  Authoritative servers
> 	need to ask queries.  The DNS protocol has evolved since
> 	RFC 1034 and RFC 1035 and authoritative servers need to
> 	translate named to addresses for their own use.
> 	See RFC 1996, A Mechanism for Prompt Notification of Zone
> 	Changes (DNS NOTIFY).

Authoritative servers in typical configurations need a resolver (and
with views, you might even need a very specific resolver).  This does
not mean that authoritative servers must be caches.  It also does not
mean that a resolver operated from the view which contains a
particular authoritatively served zone picks up the correct data (in
other words, there are configurations where the current BIND magic
does not work).

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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