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Date:      Fri, 03 Nov 2000 20:20:38 +0100
From:      mouss <usebsd@free.fr>
To:        "Don Sutter" <drs@hevanet.com>, <questions@freebsd.org>
Subject:   Re: IP Aliasing and FreeBSD 4.1.1
Message-ID:  <4.3.0.20001103201229.02ccd8b0@pop.free.fr>
In-Reply-To: <000d01c05c09$68bc3600$20180142@phx76216>

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Hi,

by ip aliasing, do you mean NAT?
note also that BSDi and FreeBSD are different systems, though
there are many common things.

I don't use IPFW, so I can't help you here other than suggesting that
you check the ipfw@freebsd.org mailing list archive.

but you can use IP filter instead. It comes with FreeBSD.
documentation is available at the official site:
http://coombs.anu.edu.au/~avalon/ip-filter.html

mainly, you'll need to compile the kernel with the options IPFILTER
and probably IPFILTER_LOG enabled. then check the howto and other
docs at the URL above. if you need more infos, send me a private mail
and I'll try to help.


At 19:41 01/12/00 -0700, Don Sutter wrote:
>I am running a private network (192.168.x.x) and recently
>added a high speed ethernet internet connection on a static
>public IP address.  I would like to set up IP Aliasing (so
>all my private machines can access the internet) and setup
>firewall protection for my private network.  I bought a
>Version 4 FreeBSD Power Pak and discovered that it contained
>a 3rd Edition "Complete FreeBSD" book.  A also downloaded
>and installed the latest FreeBSD 4.1.1 in a multi homed
>machine and I downloaded and printed the latest FreeBSD
>Handbook.
>
>I figured out how to re-compile the kernel with "options
>IPFIREWALL", "options IPDIVERT" and even figured out how to
>get my sound card working but the description of rc.firewall
>in my Version 3 Complete FreeBSD book looks quite different
>than /etc/rc.firewall on my system.  I thought I'd start by
>adding the three lines at the top of page 507 to my
>rc.firewall file but now I'm not sure of where to put them.
>
>/sbin/ipfw -f flush
>/sbin/ipfw add divert natd all from any to any via ed0
>/sbin/ipfw add pass all from any to any
>
>I use ed0 instead of tun0 as used in the book.
>
>Am I looking at the wrong manual?  Did rc.firewall change
>between BSDi v3 and 4.  Allowing private network machines to
>access the internet via IP Aliasing and a multi-homes BSDi
>box sounds simple enough.  Perhaps someone out there could
>point me in the right direction...
>
>Thanks
>
>Don
>
>
>
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