Mud clients are programs specially designed to connect to muds. They generally offer extended aliasing and triggers and other features not available to users of normal telnet. You are allowed to use a mud client to connect to DR. However, you may not use the mud client to do anything that isn't possible with the on-game aliasing system. This system is very advanced and is constantly evolving. If you have a question about whether something is legal, you should ask a wizard before you do it. You may also be asked to demonstrate a method for accomplishing what you're doing with a client using the on-game systems. Note in particular that the on-game system does not allow you to do anything automatically if your character is more than 5 minutes idle, and while it does have some conditional parsing, it cannot do everything. You are also allowed to have your client unidle you for the purpose of keeping your network or ISP connection alive. The only commands which can be sent automatically for this purpose are 'save', 'save silently', or 'pause'. You are not allowed to have your client unidle you for the purpose of beating the on-game limits on alias duration.