*BSD News Article 44383


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From: jcnc@silicon.eppet.pt (Joao Neves Cabral)
Newsgroups: comp.unix.bsd.misc,comp.unix.bsd.freebsd.misc,comp.unix.bsd.netbsd.misc,comp.protocols.tcp-ip
Subject: Re: Building network with private IP addresses
Followup-To: comp.unix.bsd.misc,comp.unix.bsd.freebsd.misc,comp.unix.bsd.netbsd.misc,comp.protocols.tcp-ip
Date: 23 May 1995 19:32:18 +0200
Organization: EPPET
Lines: 45
Message-ID: <3pt672$sfd@silicon.eppet.pt>
References: <Pine.BSD.3.91.950523115231.24916B-100000@brc.minsk.by>
NNTP-Posting-Host: silicon.eppet.pt
X-Newsreader: TIN [version 1.2 PL2]

Alexey Demianenko (a.d.@brc.minsk.by) wrote:
: Hello !


: My company is going to attach to its network other
: organizations to use simple IP client-programs for
: Windows (WinFTP, Netscape, etc.) there. 
: To my mind this is a very bad idea to give them 
: IP-addresses (class 'C') of my network area. 

: I'd like to give them private IP-addresses. Does
: someone know what the software I have to use to build
: such network with gateway that works with both private
: and external address areas ?

You can for example:

Give private IP addresses to the DOS boxes (and other computers that
you don't want on the net). Check the RFC (which I can't remember the
number right now) for the oficial private IP numbers (these numbers
shouldn't be routed in the Internet, so there is no risk of
conflicting with other existing ones).

Connect your server to the outside world using an oficial recognizable
IP address (the server would have at least two IP numbers, the public
and the private one).

TCP/IP applications from DOS would only have access to the inside
network.

Install CERN's httpd with proxy support on your server.

Configure DOS workstations netscapes to query the proxy server, and
you have worldwide WWW, Gopher, Wais, FTP, ... on these boxes with Netscape
without having them on the net. You can use other browsers such as
Mosaic which also support proxy.

You can then install pop3 and client-based programs to use email.


You can use FreeBSD for doing this with very good performances (I have it
set up like this, and I'm really happy with it).

rgds,
Joao.