A caretaker or custodian; someone who maintains a school building specifically and may serve other administrative roles.
Someone who looks after the maintenance and cleaning of a public building.
A doorman.
A moderator for a discussion forum.
A building for the porter(s) near the gate of a castle, college, etc., (historical) formerly used as a place of punishment for the staff.
An equivalent room near the gate of a college, chiefly used as a mailroom.