Telnet for Windows XP.

There is a nice bug in the Telnet program supplied with Windows XP. When you type your password, local echo is switched off so others cannot see what you are typing. Unfortunately, Telnet fails to switch it back on again, and fails to accept any further entries! Luckily this can be fixed manually:

First, if you already cannot see what you are typing, press 'CTRL ]'. This enters command mode. Type 'set localecho' then press return twice. You should now be able to see what you type.

After password entry, it is likely you will no longer be able to see what you type and the game won't receive anything you enter. Return to command mode by pressing 'CTRL ]'. Type 'set localecho' then return. Type 'set crlf' then return. Good old Microsoft eh?