Additional interface routing

fireball · Jul 30, 2007, 9:42 PM

I have a fourth interface on my pfsense box (1,2,3 are WAN,LAN,DMZ). I would like to use this additional interface to route traffic to my Linksys wireless router. What is the best way to do this using the fewest number of public IPs to do it? The Linksys router only needs a single IP, since it can do NAT itself (unless I can get pfsense to do NAT on this additional interface…. I only saw the ability to NAT on the LAN.)

I am thinking that I have to make a small subnet like a /30 and then use one of those addresses for the NIC on the pfsense box, and the other for the IP of the Linksys router.

Hopefully there is some easier way to do this. Ideally I could somehow use only a single public ip.

Thoughts?

Thanks in advance!

cmb · Jul 31, 2007, 12:19 AM

Plug one of the switch ports on the Linksys into the OPT port on pfsense, which will just bridge the wireless over to pfsense. setup a private subnet on that OPT interface with DHCP and it'll automatically NAT out your WAN IP.

fireball · Jul 31, 2007, 4:22 AM

@cmb:

Plug one of the switch ports on the Linksys into the OPT port on pfsense, which will just bridge the wireless over to pfsense. setup a private subnet on that OPT interface with DHCP and it'll automatically NAT out your WAN IP.

This worked great. Thanks so much.