The Forum is setup using SimpleForum. This is only applied to groups in the wiki whose name starts with Forum.
The frontpage is
(:nogroupfooter:) (:if enabled AuthPw:) (:newforumtopic:) (:if ! enabled AuthPw:) You must be logged in to post. (:ifend:) (:pagelist group={$Group} list=normal fmt=forum:)
and the GroupFooter is
(:if ( enabled AuthPw ) and ( ! name GroupHeader,GroupFooter,GroupAttributes,RecentChanges ) :) (:commentboxchrono:) (:if ! enabled AuthPw:) You must be logged in to post. (:ifend:)
Editing is restricted to @admin.