BAN %|[<channel>] [<nicks>]
BAN %|[-normal | -user | -host | -domain | -custom <type>] <nicks/masks>

Bans the specified nick or userhost mask.

If nick is given as parameter, the ban type is used to generate the ban mask. /SET ban_type specified the default ban type. Ban type is one of the following:

    Normal - *!*user@*.domain.net
    User   - *!*user@*
    Host   - *!*@host.domain.net
    Domain - *!*@*.domain.net
    Custom [nick] [user] [host] [domain]

If no arguments are given the current bans in this channel are displayed.

Examples:
    /BAN loser        - Bans the nick 'loser'
    /BAN -host loser  - Bans the host of nick 'loser'
    /BAN *!*@*.org    - Bans all the users coming from any .org domain.

    /SET ban_type custom nick domain - nick!*@*.domain.net
    /SET ban_type custom user host   - *!user@host.domain.net

See also: KNOCKOUT, KICKBAN