SECURITY SET JOINUNREGISTERED

Usage: SECURITY SET JOINUNREGISTERED [NONE|IRC|JAVA|BOTH]

This command will limit which clients can join unregistered channels based on their status. For example if you have it set to java, then only java clients will be able to join unregistered channels:

NONE - Don't allow any clients to join unregistered channels.
IRC - Only allow IRC clients to join unregistered channels.
JAVA - Only allow Java clients to join unregistered channels.
BOTH - Allow both client types to join unregistered channels.

Examples:
/as security set joinunregistered irc
/as security set joinunregistered java
/as security set joinunregistered both

This mode can lead to reduced server abuse by drones and other types of malicious clients. See also security set joinunmananaged