Now we know that the real meat and potatoes of the Windows Firewall is inside the WFAS console, so let's use WFAS to build ourselves a new rule. On this RA1 server, I have enabled RDP access so that I can more easily manage this server from my desk. However, by turning on RDP I have now allowed RDP access from all of the networks on this server. That means I can RDP into RA1 from inside the network, but I can also RDP into RA1 from the internet, since this is a remote access server and happens to be connected straight to the internet. This is a big problem, because now any yahoo on the internet could potentially find my server, find the RDP login prompt, and try to brute force their way into RA1.
To alleviate ...