Type: Public Private Invisible
PUBLIC
Anyone can view this forum and any 4N member can post.
PRIVATE
Anyone can view this forum but only approved 4N members can post. Anyone can invite themselves to your forum but you will need to give approval before they are allowed to post.
INVISIBLE
Only approved 4N members can view and only approved 4N members can post. 4N members cannot invite themselves (they can't see the forum!) so you need to invite members to join before they can post