I need remote connection to a certain network, i have tryied RDP, but after i scanned with Nessus, he recomended to shutdown this service because is possible to a man in the middle attack, or a dicionary attack.

But i realy need this access, so what would be the solution?
VPN ???
I need access to admin services from servers, or even help users trought VNC.
What would you recomend?
This a Frame relay tecnology... and its pointing to a server where the services are listening.