Share files from 2 computers connected to same router from remote location

Question

I can remotely (from external IP) share file from one computer connected to my router but I cannot share with other machines on my home network. Same with ARD access. Is there a way to access multiple machines across my router?

Answer 1

The only easy way to do this would be to use something like Back To My Mac with a MobileMe subscription or [LogMeIn|https://www.logmein.com].
The problem with what you're trying to do is that your entire home network only has one IP address to the outside world. How did you get it working in the first place? I'm assuming you've got a wireless router and set up port forwarding on the router to redirect traffic to a specific machine. The problem there is that file sharing uses a specific port (548), and you can only map that port to one machine at a time.
One possibility would be to use different services for different machines. For example, you could share files normally (port 548) on one machine and via FTP (port 21) on another. Another possibility would be to enable screen sharing on the one you can access from outside your home network, then use screen sharing to make that machine log in to the other machines on the network. Of course, neither of these are ideal solutions.