[19810] in North American Network Operators' Group
Re: UDP packet/DNS server
daemon@ATHENA.MIT.EDU (Matthew Petach)
Mon Sep 28 00:20:25 1998
From: Matthew Petach <mpetach@netflight.com>
To: tatsuya@giganet.net (Tatsuya Kawasaki)
Date: Sun, 27 Sep 1998 21:11:32 -0700 (PDT)
Cc: nanog@merit.edu
In-Reply-To: <Pine.GSO.3.95LJ1.1b4.980928123422.29104A-100000@thongvilay.giganet.net> from "Tatsuya Kawasaki" at Sep 28, 98 12:44:04 pm
>
> 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
