Before I installed the VPN Client on Windows XP Pro, I was able to connect to a certain device on my network (same subnet only). The device itself uses UDP ports 30655 and 30654 to discover and assign a TCP/IP address. Afterwards it uses the assigned ip and fixed port number 2000 as the remote address. The local port number used can be anywhere between 1024-5000, it connected on 4874. I was able to then talk to and control this device. After installing the VPN client, I can see and attempt to connect to the device, but it times out. I have not even configured the software. What appears to happen is that the device sends it's IP address out and does not get a response... somehow being blocked.
I was wondering what exactly happens after the VPN client is installed for it to cause this type of behavior even when no active VPN connections exist.