Assign one external static IP to all interfaces?

[altiris]

I am getting ready to purchase parts for a computer to put pfsense on but there is one killer feature I need to be sure pfsense supports, as well as how to set up this feature. Currently, I have a Sonicwall TZ210 that has a static ip from my ISP assigned to it. The TZ210 shares/assigns that IP address to the Ethernet ports (basically, any connected device will have the same external IP as the sonicwall). Is this possible to do with pfsense, and how, could you link me to a guide or explain here? I will greatly appreciate the feedback.

[cmb]

That's how things work by default, no need to do anything.

[muswellhillbilly]

Just for your reference - http://en.wikipedia.org/wiki/Network_address_translation