*BSD News Article 88545


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Newsgroups: comp.unix.bsd.freebsd.misc
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From: mvh@netcom.com (Michael Harding)
Subject: Help!  Firewall routing!
Message-ID: <mvhE532G0.K6J@netcom.com>
Organization: Netcom On-Line Services
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Date: Tue, 4 Feb 1997 14:47:59 GMT
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Sender: mvh@netcom18.netcom.com
Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:35111

I'm having the following problem:

I'm trying to go from

ext. net ---> router <--- internal net

to

ext. net ---> router <--- freebsd machine ---> internal net

where I of course have two ethernet cards on the freebsd machine.

The router currently has a *.1 address, the freebsd machine currently
has a *.15 address, and the interl net has addresses all over the
place.  I would like to keep the external address of the freebsd *.15
because that's where mail is set up to go.  I can use anything for the
internal address.  Also, the router is administered by our ISP and I
would just as soon leave it alone.

So, is it possible to do the above without changing any addresses?
Would I have to add static routes?  I'm not sure I can do it, but it
would be a pain to reconfig half of our network to support this...

Mike Harding