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3Com problems with opening Gateway ports

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by eporteni

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Okay, see if you can follow this. I have hooked up a 3Com? OfficeConnect? Cable/DSL Gateway - 3c855-us, in a user's business. I have about 8 PCs connecting through DHCP, and they also access the internet through a verizon DSL connection. Well, thereis a user who needs to connect to a program on a unix box inside the gateway/firewall. I figured I'd set up gateway to allow a connection to the IP, say 192.168.1.250, on port 5050, so that this user can connect over the internet, to the unix box and run her program. Well, nothing works. I'm just wondering if it's at all possible with this gateway, because wouldn't the person who needs to connect have to hit the IP given by verizon, then the IP of the gateway, then the IP of the unix box? it's frustrating, because the online program only allows for one IP address to be entered, but I don't know which one to put in. None seem to work, but maybe I'm entering them wrong? Has anyone ever seen anything like this? Thanks for the help in the meantime... whatever you can provide.

3 replies

by ann777

The one ip address in the router (provided by the isp) is the one that needs to be setup. It's the only ip address that will work based on the Cable/DSL router's method of routing (NAT is the only thing these routers will do... a one-to-one ip address translation).

The only way to get the user into the unix box would be to install Remote Control software (and there are many versions out there for unix and windows -- PC Anywhere, etc) and have her/him get in normally and via the one serverremote control to the unix box. The server will need remote control software and be waiting as a host, then the user will need to run another remote control session from that box to the unix box. It's cumbersome, but it works.

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