Nt

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What does +nt mean?

Every time I create a channel, I see this:

+++ irc.mibbit.net set the channel to mode +n
+++ irc.mibbit.net set the channel to mode +t
* irc.mibbit.net sets mode: +nt

And other variations on the theme.

This is the default mode applied to every channel on creation on the irc.mibbit.net network.

Other networks may have slightly different defaults.

Mode +n

Channel mode +n means, that no users that are not in the channel are allowed to send messages in to the channel.

  • This is a spam and harassment protection.
  • If this mode is turned off, any user, even if not in the channel, can type /msg #TheChannel This is an outside message.
  • If this mode is turned off, any user, even if not in the channel, can type /notice #TheChannel This is an outside notice.
    • You can issue the command /mode #TheChannel and see if n is in the list. It is Case Sensitive.
    • If you are an OP of that channel, you can issue the command /mode #TheChannel +n and set +n. It is Case Sensitive.
  • If you really want to turn off this harassment protection, you would issue the command, as an OP, /mode #TheChannel -n.

Mode +t

Channel mode +t means, that only the Channel OPS (Owner/Founder, Admin, OP and HOP) can set and/or change the channel topic.

  • If this mode is turned off, any user can type /topic #TheChannel I changed your topic.
    • You can issue the command /mode #TheChannel and see if t is in the list. It is Case Sensitive.
    • If you are an OP of that channel, you can issue the command /mode #TheChannel +t and set +t. It is Case Sensitive.
  • If you want to turn off this, you would issue the command, as an OP, /mode #TheChannel -t.

References

UnrealIRCD User and Channel modes [1]

UnrealIRCD User and Oper commands [2]