I upgraded from 2.9 to 4.5 (with out testing the 3.5 upgrade) and now I can’t use VNC to control PCs through the VPN. I can ping the PC and even browse the drive and NAS drive attached to it, but the VNC client times out.
Sounds like a firewall or NAT issue. There are a few changes, disable your firewall rules and double check your NAT if you are using that. I bet you will find something in there. Else a MT consultant should be able to help out.