We are using a 3com x506 as our firewall. I have a couple of port forwards to servers on the inside. We have one system that we just got installed that I want to allow outside access to. No matter what I do I cannot port forward to this device. I'm not sure what kind of system it is, but we can access the system's web interface internally by IP on port 81 no problem. When I try to port forward in from the outside, I just get a page cannot be found message. I setup another server with an internal IP, set its website listening port to 81, and forwarded in no problem to make sure things were working through that port. I shut that server down and tried to access the other server and nothing. When I do a port scan online, my others servers show the firewall has the ports open to get to them. This server when says that port 81 is closed. Even though I can access internally. I am at a loss at this point, I have tried all kinds of things and no matter what nothing works. What else can I do or check to try and figure out why I cannot port forward in to this server, but I can to any other server on our network.