Date: Tue, 01 Jul 1997 09:16:36 +0300 From: Nadav Eiron <nadav@barcode.co.il> To: robert@chalmers.com.au Cc: freebsd-questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Question: using the Non-Assigned IP numbers and routing Message-ID: <33B8A0C4.6703@barcode.co.il> References: <33B82BED.4A80@chalmers.com.au>
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Robert wrote: > > Another question. > > If I have a fbsd machine, attached to an ISP, with an assigned > IP provided by the ISP, how do I set up those 196.x.x.x IP numbers > on my "internal" route so that the machines on the internal net > can all see through the fbsd machine and out to the Internet, > and so the internet can send email in to the machines on the > internal net, without the internal net numbers being visable > to the Internet at large. Which of course they shuldn't be. > > Thanks for any pointers here. routing confuses the hell out of me! > > cheers, > Bob > -- > http://www.chalmers.com.au Books-New & Secondhand Support Whirled Peas. > Agents for CIBTC. Associate of Amazon.com, and Partner Program with iBS. > Books about China, books from China. Sheng huo jiu shi dou zheng > Business Links in Dalian, and Beijing. Building the China Trade First, the block of unassigned (private) C-class addresses is 192.168.x.x. Next, what you're looking for is generally called IP aliasing or NAT (Network Address Translation). If you're using a dial-up connection on your FreeBSD machine, read the ppp tutorial at http://www.freebsd.org/tutorials/ppp/ppp.html If not (i.e. you have a fixed connection adn a router, and you use FreeBSD as an internal router or as a firewall), take a look at the IP aliasing tutorial, as well as the docs for natd. Nadav
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