Syntax: /nickserv SET KILL (ON | QUICK | IMMED | OFF)

Turns the automatic protection option for your nick on or off. With protection on, if another user tries to take your nick, they will be given one minute to change to another nick, after which NickServ will forcibly change their nick.

If you select QUICK, the user will be given only 20 seconds to change nicks instead of the usual 60. If you select IMMED, user’s nick will be changed immediately without being warned first or given a chance to change their nick; please do not use this option unless necessary. Also, your network’s administrators may have disabled this option.