This URL describes how RA behaves with various combinations of UPnP compliant
firewall/NAT/routers...
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q301529
You also might look at using the email or file method of invitation and possibly modify the RCTICKET
field in the invitation file as needed...
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q300692
Lastly, make sure TCP Port 3389 is forwarded to the LAN IP address of the PC requesting help.
For additional help with RA...
http://www.microsoft.com/windowsxp/expertzone/focuson/remoteassist.asp
http://www.microsoft.com/windowsxp/pro/using/howto/gethelp/remoteassist/rafaq-ge
neral.asp
http://www.microsoft.com/windowsxp/pro/using/howto/gethelp/remoteassist/rafaq-te
chnical.asp

Signature
Al
Please post *ALL* questions and replies to the news group for the mutual
benefit of all of us...Unsolicited personal emails are *NOT* answered.
> I thought you could use RA through a firewall using
> messenger or something. It that true and is there
> someplace that shows how to set it up?