Article 13281 of news.software.nntp:
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From: hucka@eecs.umich.edu (Michael Hucka)
Newsgroups: news.software.nntp
Subject: Re: Accessing NNTP server around a firewall
Date: 05 Apr 1996 23:58:31 -0500
Organization: University of Michigan EECS, Ann Arbor, Mich., USA
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Sender: hucka@hawk.eecs.umich.edu
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References: <4jscou$ftc@nntp.igs.net>
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In-reply-to: lum@host.igs.net's message of 2 Apr 1996 23:21:02 GMT
X-Attribution: Mike Hucka
To: lum@host.igs.net (Stephen Lum)
X-Newsreader: Gnus v5.1

>>>>> On 2 Apr 1996, lum@host.igs.net (Stephen Lum) wrote:

  lum> If our internet provider has an NNTP server that we can access if I am
  lum> connected to the machine that sits on the firewall, can our site be
  lum> setup so that the same NNTP server can be accessed from machines
  lum> inside the firewall?

  lum> The problem is that machines inside the firewall cannot access any
  lum> outside Internet addresses.  Netscape can get around firewalls using
  lum> proxies.  Does a similar concept exist for news?

From the INN FAQ:

  Subject:  Setting up proxy-nntp to talk through a firewall

  Try ftp.cs.cmu.edu:misc/dnntpd/dnntpd.tar.Z
  or look at backends/rcompressed.c in the INN distribution.
-- 
Mike Hucka     hucka@umich.edu     http://ai.eecs.umich.edu/people/hucka
University of Michigan AI Lab & EECS Departmental Computing Organization