Remote Desktop Connection

Hello!

I started learning VPN but it's not as easy for me so now I will first learn how to set and use a Remote Desktop Connection.

And I think I've got it, it's working, it's really easy, but I'm getting warning messages like "Unknown publisher", "Remote computer cannot be verified.", "The Certificate is not from a trusted certifying authority." etc.

Why is that so? I am connecting from a Windows 7 PC to Windows Server 2008 PC, both are in my own house, on a different network though (separated by a router so I can simulate a "real" internet connection).

So how can I properly secure the connection and get rid of those warnings?

Also, how secure is the Remoted Desktop Connection? Is it as safe as Teamviewer, more, less...? Should I change the default RDC port (3389) to another number in the router? Anything else I should know?

Thank you very much!

Your connection is (relatively) secure, I believe the warnings are because of digital certificates and you need to have Public Key Infrastructure (PKI) to assign certificates to the computers.