nat and dns

Jozsef Kadlecsik kadlec at
Fri Sep 24 11:43:20 CEST 2004

On Thu, 23 Sep 2004, Jason Opperisano wrote:

> > Most DNS queries take place over UDP, however if the
> > reply to the query is especially large then a new TCP connection is
> > opened between the client and server.
> find me a response to a client resolver request that doesn't fit in a
> single UDP packet, and i'll stop seeing red every time i see someone
> recommend allowing TCP 53 from any IP to their DNS server (*).

AIX uses just TCP, even for a plain query.

Best regards,
E-mail  : kadlec at, kadlec at
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Address : KFKI Research Institute for Particle and Nuclear Physics
          H-1525 Budapest 114, POB. 49, Hungary

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