Property perimeter Physical barriers such as fences, walls, gates, and booths are used. A security guard can control access in person from a booth at the entrance, or by remote control using a video camera. While on gate duty, you may also have to check vehicles entering and leaving, and prevent the illegal removal of equipment and material. The client must give you up-to-date records of authorized vehicles. You must keep a detailed record of all movement throughout the gate. Record important information such as the make, model, year, and license numberof all delivery and visitor vehicles. You may also have to check that seals are not broken and that all cargo is listed on a waybill.