Remote Desktop for Windows Vista

To allow other computer to remotely connect to Windows Vista, need to do the following:

1. go to Control Panel/System/Remote setting, check on Allow connections from computers running any version of Remote Desktop
2. click "Select Remote Users.." and select what user will be allowed to connect to this machine.

Microsoft claimed that the account used for remote desktop connection doesn't allow to use null (blank) password, this is wrong. but in order to allow null (blank) password, we need to:

1. go to Control Panel/Administrative Tools/Local security Policy/Local Policies/Security Options
2. in the right panel, find "Accounts: Limit local account use of blank passwords to console logon only" and disable this setting

Connect from computer outside LAN

1. follow the procedure of Port Forwarding for the 2 wire 2701HG-G, remote desktop vista from outside computer is now able to connect to the vista machine :-) (forward port 3389 for TCP/UDP)

reference:
Remote Desktop for Windows XP