SECURITY SET DCC INITIATE

This command allows you to block DCC (Direct Client to Client) session initiation; this has the effect of preventing the use of DCC over your server. You can selectively allow or disallow file transfers (dcc initiate file <enable|disable>), private chat sessions (dcc initiate chat ) or any other client-specific, but unknown types.

Example:
/as security dcc set override enable

You would normally use this command if you wanted to disallow the use of DCC on your network, either to limit file transfers, or to limit private chat sessions.

SECURITY DCC SET OVERRIDE

By default, the server will not allow file transfers when the filename matches an entry in the file masks table. This command determines if a user will be able to set a mode (/UMODE +d) which will allow them to send and receive files that are on the list of dangerous file extensions.

Example:
/as security dcc set override enable

You would normally use this command to control whether advanced users are able to transfer files that match potentially dangerous file types, or names.