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From: brian@shift.utell.net (Brian Somers)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: IP Aliasing
Date: 13 Jun 1997 09:49:42 GMT
Organization: Awfulhak Ltd.
Lines: 36
Message-ID: <5nr53m$quc@ui-gate.utell.co.uk>
References: <01bc576a$ff7a8260$64d91dce@phishhead.dawtech.com>
<86afmc5qqm.fsf@bitbox.follo.net>
<339cc8f2.88895331@news.mindspring.com> <5njja2$dnh@news.gvsu.edu>
<1997Jun10.152644.14248@bilver.oau.org> <5nk0td$hid@news.gvsu.edu>
<5npmpf$2gt$1@hole.sdsu.edu>
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In article <5npmpf$2gt$1@hole.sdsu.edu>,
jdavison@yoda.sdsu.edu (John W. Davison) writes:
> Matt Behrens has stated:
>: Aliasing has always meant, AFAIK, simply allowing an IP address to respond
>: to packets sent to a different number. i.e. if you have a machine
>: 10.0.0.1 and you want to move it to 10.0.10.1, you alias 10.0.10.1 to
>: 10.0.0.1 and all packets sent to 10.0.10.1 and 10.0.0.1 arrive at
>: 10.0.0.1. When you're finished with the move, of course, you remove the
>: alias.
>
>: Masquerading (or NAT, network address translation) is the act of providing
>: a sort of "front" for a number of different hosts on a remote network that
>: doesn't understand their numbers. In this example, 10.0.0.1, 10.0.0.2,
>: and 10.0.0.3 can all use 10.10.10.10 to use services on a network that
>: knows 10.10.10.10 but can't route to 10.0.0.x.
>
> Back to the original topic, can you do IP Masquerading under FreeBSD, and if
> so, where can you find good documentation on setting it up?
The ppp program does it (or you can use natd if that doesn't suit.
The ppp in 2.2.[12] just requires you to add the "-alias" flag
to the command line :) Not much to document (although I think
it's mentioned it in the man page - certainly is now).
>
> ~-+-_-~-+-_-~-+-_-~-+-_-~-+-_-~-+-_-~-+-_-~-+-_-~-+-_-~-+-_-~-+-_-~-+-_~-+-_-~
> John Davison + "Those that give up essential liberty
> San Diego State University + to obtain a little temporary safety
> jdavison@yoda.sdsu.edu + deserve neither liberty nor safety."
> http://yoda.sdsu.edu/home/jdavison/ + -- Benjamin Franklin (1773)
> *** PGP Key on my Home Page ***
--
Brian <brian@awfulhak.org> <brian@freebsd.org>
<http://www.awfulhak.org>
Don't _EVER_ lose your sense of humour !