You can connect to Nightfall on different ways:

• Use Telnet: Open the shell and type "telnet nightfall.org 23"
• Using PuTTy: Get Putty, start it and use as host "nightfall.org" and as protocol "Telnet". The port should be 23. Click "connect".
• Using a MudClient: Download a MudClient (search with a searchmachine for "mudclient" - there are a lot of them) and connect to "Host: NightFall.org Port: 23". How to do this accurately? Depends on your client (but most clients are very easy to handle, so you shouldn't have any bigger problems).

Happy Mudding. :)