Vote for 2X SecureRDP for Windows Terminal Services
2X SecureRDP for Windows Terminal Services increases the security of your terminal servers by accepting or denying incoming RDP connections by IP, Mac address, computer name, client version or based on time of day. This way the logon screen will only be displayed if the connection is established from particular IPs or from particular machines. Computers that do not meet the filter restrictions don't get to see the logon screen and won't get to try a brute force logon! 2X SecureRDP for Windows Terminal Services is a tool to secure remote windows web servers which you are managing via Terminal services - Remote administration.
2X SecureRDP for Windows Terminal Services works with Windows 2000 or Windows 2003 Terminal Services and does not require a client component. Servers running either in Remote Administration or Application Server mode are supported.