North American Network Operators Group
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Re: UDP packet/DNS server

  • From: Matthew Petach
  • Date: Mon Sep 28 01:59:35 1998 
> I think you mean port 53.  This is both TCP and UDP.  I thought DNS
> used both TCP and UDP.  Thus firewall that is blocking UDP traffic will
> cause zone updates to fail.

You're right, my mistake.  Sorry!  :(
 
> name            42/udp          nameserver
> whois           43/tcp          nicname         # usually to sri-nic
> domain          53/tcp
> domain          53/udp

Matt