Saw this link at an other site. You can find here a list of routers and firewalls.
These are the devices that we have written support documents for. These documents provide a step-by-step guides on how to setup port forwarding. If your device is listed there, you are in luck. Our ultimate goal is to have a writeup for every hardware router and firewall available, and instructions for every application that Internet users have difficulty getting to work through their router or firewall. These guides are provided to help you, but we are in no way responsible for the state of your network.
Listed routers and firewalls are:
3com, efficient, netcomm, thomson/alcatel, actiontec, etec, netgear, topcom, apple, gateway, belkin, westell, lectron, billion, linksys, zoom, zyxel, blitzz, planet, cisco, d-linkmaxgate, q-tec, microsoft, siemens, network everywhere and smc.
Take a look at Portforward.com