I have two computers (one WinXP and one Linux) behind a NAT router and in order to be able to reach the boinc client on both computers from outside the LAN I have to change the port that one of the computers use for communicating with the manager. I would prefer to change on the windows machine.

Is there a way that I can do this by editing a config file or do I have to use a command switch when starting the client? In the latter case, how do I do it practically? I use 6.2.18 today and I only find the BOINC tray under "run" in the registry. I guess it in turn starts the client so how should I pass the command switch to the client?

Does your router have a port redirection table? If so, you could use it to match (external) single IP, multiple ports --> (internal) multiple IPs, same port.

Otherwise, you'd neet a startup batch file which includes

boinccmd --gui_rpc_port N

(from the BOINC Client Configuration Wiki)

Does your router have a port redirection table? If so, you could use it to match (external) single IP, multiple ports --> (internal) multiple IPs, same port.

Yes it does! Never thought of that for some reason. I now have configured the router and I will test it at work tomorrow. Thanks alot!