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North American Network Operators Group

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Re: UDP packet/DNS server

  • From: Matthew Petach
  • Date: Mon Sep 28 00:25:54 1998

> 
> Hello Nanog,
> 
> I am trying get zone trasfer from a host, but it seems that because of
> firewals?, I can not get any record.
> They acknowelged that there is a host behind the firewalls but they claim
> it should not affect it. (I don't believe it.) 
> But I don't know how to check/prove that  if certain host can
> receive/send an UDP packet.

Zone transfers are handled via TCP, not UDP.  See if you
can telnet to port 51 on their nameserver; if you can't
get a connection established,  you won't be able to do
a zone transfer.
 
> TIA,
> Tatsuya

Matt





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