multi-homed,masquerading

[ksemat at wawa.eahd.or.ug]

Hello everyone,
I want to thank all of you for your help on my previous problem with DNS.
As well for the valuable advice as regards installing BSD on one of my
machines. I acquired another machine on which I successfully installed
FreeBsd 4.0 however I would like some advice on how to use it as a gateway
for my network I have been using linux with ipchains but I find that
Freebsd does not have ipchains rather ipfw and the syntax seems to be
different. I would like to get some links on where I could read about the
syntax for ipfw or even better where to get ipchains for BSD.
Secondly I have acquired another link from another upstream and would like
to be multi-homed and thus would like some advice on the set up. Here is
my set up right now:
I have a uni-24 antennae from breezecom that is connected to a 4 port
Pro.11 also from breezecom. Each of these ports connects directly via UTP
to a linux machine. Now for redundancy we have acquired another link from
a different provider which has similar equipment except that the radio
unit is an SA pro.11 with one port which I have connected to the Freebsd
machine I mentioned earlier. Now my question is how do I set this up such
that the two links back each other up would I use something like piranha
or use a router? And can I get directions on setting up the topology of
the network? 
Sorry for the long post but I wanted to make sure that I put the question
forward as clearly as possible.

 Noah
ksemat at eahd.or.ug
 



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