Our first Q & A of the week comes from wchan3
via the PCstats forums . If you
are looking for help, try our reader feedback page
Q: I've read your "remote access to computers
" article. I like it very much, but I don't think
you've addressed anything related to a server computer that is behind a router.
What do I do if I have a router and I want to access my computer at home behind
a router from 1000 miles away?
A: A router firewall will
block remote access programs just as it will block any other unsolicited data
attempting to come into the server. The key then is to determine which
ports your remote access program uses and either open those ports in the
firewall or create a 'virtual server'
rule. A virtual server rule tells the router firewall to forward any data
received on a certain port directly to a specific computer inside your
network. For example, the VNC server program uses port 5800 by default, so
creating a rule which forwarded data received on port 5800
to port 5800 on your internal server would allow VNC to work
unhindered by the firewall.
Virtual server rules can be easily created using
the internal interface of most home routers. Generally you need to provide
an outside port number, the IP address of the PC inside the network that will
receive the forwarded data, and which port that PC should receive the data
on. For a more detailed guide to creating virtual server rules, see our Beginner's guide to firewall setup and configuration. As
stated, VNC uses port 5800 by default (though other versions of the software may
vary) and Microsoft's remote desktop software uses port