From owner-freebsd-questions Wed May 29 15:45:03 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id PAA18184 for questions-outgoing; Wed, 29 May 1996 15:45:03 -0700 (PDT) Received: from mistery.mcafee.com (jimd@mistery.mcafee.com [192.187.128.69]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id PAA18172 for ; Wed, 29 May 1996 15:45:00 -0700 (PDT) Received: (from jimd@localhost) by mistery.mcafee.com (8.6.11/8.6.9) id QAA21144; Wed, 29 May 1996 16:03:58 -0700 From: Jim Dennis Message-Id: <199605292303.QAA21144@mistery.mcafee.com> Subject: Re: RFC for special IPs/Private Networks? To: kristyn@gnu.ai.mit.edu (Kristyn Fayette) Date: Wed, 29 May 1996 16:03:57 -0700 (PDT) Cc: questions@FreeBSD.ORG In-Reply-To: <199605292107.RAA07633@spiff.gnu.ai.mit.edu> from "Kristyn Fayette" at May 29, 96 05:06:45 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk RFC 1597 Jim Dennis, System Administrator, McAfee Associates > > Hiya, > > This isn't actually a FreeBSD question, but I did see a reference to what I'm > looking for a long time ago in a version of FreeBSD far far away. > > 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. Technically they won't be issued to anyone on the internet by the IANA. Most well-configured routers will filter them -- but that is by configuration -- not by design. > 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? You'll still need to filter these out at your own router and you'll probaby want to ensure that source routed packets aren't allowed through either. The addresses that have been reserved are: 10.*.*.* (One class A address) 172.16.* through 172.31.* (16 class B addresses) and 192.168.*.* (255 class C addresses)