Computer A) Laptop running XP Pro. User's home computer, is used both at office and at home and when user is out with clients.
Computer B) Desktop, strictly at the office. XP Pr.
Server) SBS2003, running as the DC, and VPN Server.
Computer C) My computer. Desktop. XP Pro, nothing to do with this company what so ever.
User wants computer A to connect to computer B via RDP. To enable this, we've set up a VPN connection that works fine for everyone concerned. Computer A cannot RDP to Computer B, when on the same network, when on the same network and connected through VPN, when on different networks over VPN.
So, ok, it's a firewall issue with computer A, but, computer A can RDP to Server. And from there can RDP to Computer B.
So it's an issue with computer B, but I can connect to computer B from computer C when I VPN to the network.
Server can RDP to computer A and B.