Magic
I don't think it can be done for an initial setup. You would ultimately have to setup telnet to the box and then it would probably be doable. However, this would be rather difficult. Seems easier to boot to X (kde/ whatever you like) and setup the router that way using firefox. I do believe there are other ports open but I must confess my ignorance of linux on this topic.
Bottom line. Telnet/SSH (for security of course) is not enabled and it is designed to be managed via the web interface.
Bill