What does locking the mud do, exactly?
When the mud is locked, only members of the authorized groups are permitted to log in. By default, these groups are SECURE, ASSIST, ELDER, and TEST. Anyone who is not a member of these groups, whether they are a creator or a player, is prevented from logging in. To lock the mud, use the admintool command, option a. To add people to groups, use the admintool command, option v.