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From: "Michael C. Shultz" <ringworm01@gmail.com>
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Date: Thu, 17 Feb 2005 20:57:29 -0800
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Subject: Re: Operation: "ipfw on a gateway box"
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On Thursday 17 February 2005 06:12 am, Lowell Gilbert wrote:
> > > Does anything work *without* the firewall?
> >
> > Yes, before I started messing with the firewall I had squid
> > set up, I set up FreeBSD as a gateway and also as a DNS
> > server. I could acces the WWW, ftp, telnet and all the
> > other services at will, inside and outside my home LAN.
>
> Try temporarily setting the firewall to just pass everything
> ("ipfw add 1 allow ip from any to any") and see if you can still get
> out through it.  I'm guessing something else may be messed up now.

If he is using it as a gateway for other machines he will still need 
NAT. Try this to open the fire wall up:

public="xl0"
private="xl1"
loopBack="lo0"

ipfw add 00100 allow all from any to any via $private
ipfw add 00110 allow all from any to any via $loopBack

#
# Net Address Translate (NAT) incomming packets
#
ipfw add 00120 divert natd ip from any to any in via $public

#
# Net Address Translate (NAT) out going packets
#
ipfw add 01000 divert natd ip from any to any out via $public
ipfw add 01010 allow ip from any to any

I just clipped these from my rules, thats why the weird numbering 
scheme.

-Mike