best way to connect from a xp pro pc behind a adsl modem router to another xp pro pc behind a adsl modem router

hello,

i have a netgear ADSL modem router running NAT. my friends also have a ADSL modem routers with NAT. all are on win xp pro.

what is the best way to run remote sessions on their computers?? i cant get help and support / ask for assistance/ remote assistance.

i keep getting an error 'unable to resolve computer' error.  how do i fix this problem? or should i do this another way??

please advise

thanks
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cooljai1Connect With a Mentor Commented:
You can use the remote desktop web connection on your PC to allow remote access from the internet.
http://www.microsoft.com/windowsxp/downloads/tools/rdwebconn.mspx
http://www.dougknox.com/xp/tips/xp_rd_web.htm see this link for a primer on the subject. But as you are using an ADSL router with NAT you may need to open some ports on the router. Check this thread for more info about the ports to open.
http://www.experts-exchange.com/Operating_Systems/WinXP/Q_20719173.html
I think opening ports 80 and 500 would do, but they talk about port 3389 of which I'm not very sure.
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JachinConnect With a Mentor Commented:
cooljai1 is correct.

What you need to do is this. Say your computer is computer A and your mate is computer B. If you want to be able to remote desktop on your mates computer ie. A to B then you need to make a port forward on your mates router for port 3389 to the internal IP address of his computer.

To do reverse, B->A then you will need to make a port forward on your modem.

Mine is something like 3389 external to 3389 internal to address 192.168.1.x.

(Sometimes port forwarding is referred to as virtual server or DMZ)
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