North American Network Operators Group

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Re: Has PSI been assigned network 1?

  • From: Randy Bush
  • Date: Mon Apr 24 12:57:19 1995

> For DNS to be usable, folks have to permit TCP DNS to work. I know of
> some service providers that filter TCP DNS connections. UDP packets are not
> big enough for many responses from an whois-type request.

Good point.  As an addendum, those wishing to prevent zone transfers can use
BIND's xfernets control to achieve this, and thus allow large responses
while inhibiting undesired zone transfers.