A mantrap is often used to secure server rooms, distribution closets or IT resources that may be susceptible to attack by tailgaters.
A mantrap, air lock, sally port or access control vestibule is a physical security access control system comprising a small space with two sets of interlocking doors, such that the first set of doors must close before the second set opens. Airlocks have a very similar design, allowing free ingress and egress while also restricting airflow.
In a manual mantrap, a guard locks and unlocks each door in sequence. An intercom and/or video camera are …