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Date: Mon, 05 Dec 2011 08:17:27 +0800
From: Fbsd8 <fbsd8@a1poweruser.com>
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APseudoUtopia wrote:
> Hello,
> 
> I'm trying to setup a small home network, It consists of my FreeBSD
> 9.0-RC2 box connected to my modem (just a modem, not modem/router) and
> two other systems connected directly via ethernet to the freebsd box.
> I'm able to connect to the internet with the FreeBSD box. I can get an
> IP via DHCP from my ISP. However, I can't seem to figure out how to
> setup the gateway routes and the IP addresses for the other system.
> 
> I'd like to have the internal network be on 192.168.1.0/24. I have 2x
> 2-port NICs in the freebsd box.
> 
> em0 - Internet - 1.2.3.4
> em1 - System1 - 192.168.1.1
> em2 - System2 - 192.168.1.2
> 
> I'm kindof lost here. I've played with it a bit, trying to set
> 192.168.1.0/24 on em1 and em2, then setting the specific IP address on
> system1 and system2 respectively. I've also tried manually adding
> routes from 192.168.1.0/24 to 1.2.3.4 (my external IP) to no avail.
> The system1/2 boxes cannot ping the freebsd box, nor vise-versa. That
> implies it's not a routing problem, but a problem with the systems
> getting a proper IP address.
> 
> Anyone have any tips?
> 
> Thanks.
> 
>

www.a1poweruser.com web site has details instructions on how to do it. 
Check it out.