The MUD is located at antikaria.com port 9000. The traditional way to connect is to open a telnet connection, but you will probably have a better experience if you use a MUD client.
The recommended way to connect is to use the web client which runs in your browser. It is available here.
There are many different MUD clients available, for all types of systems. MUD clients offer a variety of features, such as mapping, command history, and aliases that make playing muds easier.
The Mud Connector maintains an extensive list of clients available for all platforms. Below are some popular clients for Windows, Mac, and Linux.