Ok, I have posted 3 threads in 2 or three days so everyone can guess I have a lot of questions. I have just purchased a wireless router Linksys WRT54GL. I got it because it is compatible with Linux and runs Linux. I am running OpenSuse 10.2 at work and at home.

Here is my question. I got the router to work and now have wireless for my laptop and my desktop is wired to the the router, now I cannot use NX or fish from work. I can use NX and fish from home (with the router) to work, but not the other way around.

I suspect that the problem is one of the router's address not giving the requests to my computer. I have tried to enable port forwarding, but have no idea how. The Linksys website was not helpful and I have not found a step by step howto.

Does anyone know how to enable the port forwarding? Is there something I need to do in Linux at the firewall level too?

There are a couple of possible reasons for this. First, you don't have port forwarding set properly on your router (we'll deal with this below). Second, your work network restricts NX and fish traffic. I'm not familiar with fish, but I know NX works over SSH, and many workplaces don't allow outgoing SSH connections.
I've got a much older Linksys router, but I suspect the software isn't all that different. Log into the router web interface, and check if there is an Application and Gaming section. For some odd reason, the port forwarding is there, at least on mine. They might call it port range fowarding or UPnP forwarding as well, but they are both port forwarding.

Moved: This thread is more suitable in Linux Networking and has been moved accordingly to help your thread/question get the exposure it deserves.