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To: Paul Walsh <paul@nation-net.com>
From: craigs@os.com (Craig Shrimpton)
Subject: Re: Router IP address
Cc: questions@freebsd.org
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>When the freeBSD box is routing, the router IP and the boxes IP are one 
>in the same. Is that right?
>
>Then how do I give the router a separate IP address??
>
>Regards, Paul Walsh.
>
>

IP addresses are assigned to interfaces not machines.  In fact, using alias
techniques, you can assign multiple addresses to the same interface.  This
is how virtual domains are done.  A router will have a seperate (could be
more than one) IP address for each ethernet card installed.  If you only
have one interface, then it's not a router it's a host.  A router, often
called a gateway but not to be confused with a bridge, is necessary to
enable hosts on different subnets to talk.


-Craig