+MODE <channel> <+|-><modes> [parameters]
+CHANNELMODE - DESCRIPTION
+ +n - No external messages. Only channel members may talk in
+ +t - Ops Topic. Only opped (+o) users may set the topic.
+ +s - Secret. Channel will not be shown in /whois and /list etc.
+ +p - Private. Disables /knock to the channel.
+ +m - Moderated. Only opped/voiced users may talk in channel.
+ +i - Invite only. Users need to be /invite'd or match a +I to
+ +r - Registered users only. Only users identified to services
+ +c - No color. All color codes in messages are stripped.
+ +g - Free invite. Everyone may invite users. Significantly
+ +z - Op moderated. Messages blocked by +m, +b and +q are instead
+ +L - Large ban list. Increase maximum number of +beIq entries.
+ Only settable by opers.
+ +P - Permanent. Channel does not disappear when empty. Only
+ +F - Free target. Anyone may set forwards to this (otherwise
+ +Q - Disable forward. Users cannot be forwarded to the channel
+ (however, new forwards can still be set subject to +F).
+ +C - Disable CTCP. All CTCP messages to the channel, except ACTION,
+ +D - Disable CTCP ACTION. All CTCP ACTIONs to the channel will
+ +T - Disable notice. All notices to the channel are disallowed.
+ +E - No kicks. Chanops will not be able to use /kick on this
+ +N - No nickchanges. People on the channel will not be able to
+ +G - Block messages in all caps. Messages that are more than
+ 50% capital letters will be blocked.
+ +J - Prevent autorejoin on kick. Users will not be able to
+ rejoin immediately after being kicked.
+ +K - No repeat messages. Messages that are the same as the
+ last message sent to the channel will be blocked.
+ +f - Forward. Forwards users who cannot join because of +i,
+ PARAMS: /mode #channel +f #channel2
+ +j - Join throttle. Limits number of joins to the channel per time.
+ PARAMS: /mode #channel +j count:time
+ +k - Key. Requires users to issue /join #channel KEY to join.
+ PARAMS: /mode #channel +k key
+ +l - Limit. Impose a maximum number of LIMIT people in the channel.
+ PARAMS: /mode #channel +l limit
+ +v - Voice. Allows a user to talk in a +m channel. Noted by +nick.
+ PARAMS: /mode #channel +v nick
+ +h - Halfop. Grants channel half-operator status.
+ PARAMS: /mode #channel +h nick
+ +o - Op. Grants channel operator status.
+ PARAMS: /mode #channel +o nick
+ +a - Admin. Grants channel administrator status.
+ PARAMS: /mode #channel +a nick
+ +b - Ban. Prevents a user from entering the channel, and from
+ sending or changing nick if they are on it, based on a
+ PARAMS: /mode #channel +b nick!user@host
+ +q - Quiet. Prevents a user from sending to the channel or changing
+ nick, based on a nick!ident@host match.
+ PARAMS: /mode #channel +q nick!user@host
+ +e - Exempt. Allows a user to join a channel and send to it even if
+ they are banned (+b) or quieted (+q), based on a nick!ident@host
+ PARAMS: /mode #channel +e nick!user@host
+ +I - Invite Exempt. Allows a user to join a +i channel without an
+ invite, based on a nick!user@host match.
+ PARAMS: /mode #channel +I nick!user@host