fbsdq wrote:
Hello,
I was wondering if this is possible and how to do it. I just got a
t1 installed with limited IP's. I want my FreeBSD box to act as a
router to all those office pc's with my limited public IP's, and when I
run out of those I want it to also act as a natd box to my 10.x.x.x ip
addresses. Do I need three nics to get this done? One for outside
interface, one for public ip inside interface [router], and a third one
for inside public ip interface [natd]? I know how to do natd, but for
it to act as a router what do I need in /etc/rc.conf, will just
gateway_enable=YES do? or do I need to run routed?
Yes, you can do this. No, you don't need two network cards.
Use the -unregistered_only option to natd to tell it only to
translate RFC-1918 addressed (so your public addresses get
routed without translation) Set up the internal network card
with an IP in the 10.x.x.x range, as well as a public IP. Then
the machines with Public IPs can route through without translation,
but natd will translate the private ones.
Without knowing more about the layout of your network and the IPs
involved, I can't give more details. Your ISP may need to add a
routing rule to get traffic to route successfully back to you.
--
Bill Moran
Potential Technologies
http://www.potentialtech.com
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