Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!sdsu!bionet!ames!xanth!tadguy
From: tadguy@cs.odu.edu (Tad Guy)
Newsgroups: comp.windows.x
Subject: Re: Where is comp.sources.x archived for FTP (except uunet.uu.net)
Message-ID: <TADGUY.89Jul7230119@hathor.cs.odu.edu>
Date: 8 Jul 89 03:01:19 GMT
References: <8907061427.AA19048@ATHENA.MIT.EDU>
	<TADGUY.89Jul6200442@hathor.cs.odu.edu>
	<JTHOMAS.89Jul7175229@tecate.nmsu.edu>
Sender: news@cs.odu.edu
Organization: Old Dominion University, Norfolk, VA
Lines: 23
In-reply-to: jthomas@nmsu.edu's message of 7 Jul 89 23:52:29 GMT

[ Yeah, ok, so this isn't really comp.windows.x material.  It still
  might be useful for some people who also get this message from UUNET...]

In article <JTHOMAS.89Jul7175229@tecate.nmsu.edu> jthomas@nmsu.edu (543) writes:
   Maybe, but this is what I get:
	   ftp> open uunet.uu.net
	   Connected to uunet.uu.net.
	   421- Can't map 128.123.12.16 to a valid hostname
	       We only allow ftp from recognized sites.
	       Get your system administrator to fix your domain servers.

The message is pretty clearly saying that the problem is with your
domain servers.  

What's happening here is that UUNET is trying to discover the name of
the machine you are ftp'ing from by doing a PTR query on your IP
address.  If your domain servers are incorrect, it won't be able to do
this (and thus returns the 421 message above).  Your administrator
needs to fix this.

UUNET is doing a ``Good Thing''(tm) by forcing sites to use the DNS.

	...tad