Date: Thu, 30 May 1996 01:36:25 GMT From: James Raynard <fqueries@jraynard.demon.co.uk> To: kristyn@gnu.ai.mit.edu Cc: questions@freebsd.org Subject: Re: RFC for special IPs/Private Networks? Message-ID: <199605300136.BAA10580@jraynard.demon.co.uk> In-Reply-To: <199605292107.RAA07633@spiff.gnu.ai.mit.edu> (message from Kristyn Fayette on Wed, 29 May 1996 17:06:45 -0400 (EDT))
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> I remember once seeing in /etc/hosts, or a similar file, a reference to an > RFC for IP addresses that won't be propagated over routers. I'm thinking > that this must have been on the GAMMA or EPSILON release, because it isn't > in my 1.0.2 CD. 1.0.2? I've got one of those (it also had Linux 0.99 on it). Blimey, that's going back a bit 8-) Anyway, your memory is correct, it is /etc/hosts. In fact, it's still there on 2.1.0:- # According to RFC 1597, you can use the following IP networks for # private nets which will never be connected to the Internet: # # 10.0.0.0 - 10.255.255.255 # 172.16.0.0 - 172.31.255.255 # 192.168.0.0 - 192.168.255.255 > Can someone tell me what RFC this was? And does anyone know what the > GOTCHAs are for this? I already know that this network can't be directly > on the Internet, but what about with a proxy firewall seperating the two > networks? Well, as you say, no-one on the Internet will be able to see those IP addresses, but there are ways to get around this, usually by disguising them with the firewall's IP address - I think "socks" was recently recommended here to someone asking a similar question. -- James Raynard, Edinburgh, Scotland jraynard@dial.pipex.com james@jraynard.demon.co.uk
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