Abstract: An access port for installation on a door of a container is disclosed in kit form, and as an installation on a container. The access port is installed on a container surface, such as a door, close to a latch, lock, handle, release or other device utilized to close and hold the container door closed from the outside. A hole is cut into the container surface. A frame having an aperture is positioned on the outside of the container such that the aperture of the frame aligns with the hole. A cover forms a door or other suitable structure on the inside of the container that closes the hole through the container. The cover can be manually transitioned between the open and closed positions from within the container. However, the cover cannot be transitioned from the closed position to the open position from outside of the container.