Tweaking.com - Remote Desktop IP Monitor & Blocker

Tweaking.com - Remote Desktop IP Monitor & Blocker is a free tool to monitor any IP that tries to connect to the remote desktop.

This free program will monitor the remote desktop port using the Windows netstat API and keep them in a log for later viewing. The program has a built in block IP tool to easily block any IP address. It does this by using the built in Windows IP Security Policy (IPSec). It can only block IPs, but it can not unblock them.