A method and a computing system for allowing just-in-time ("JIT") access to a machine is provided. A system receives a request to allow JIT access to the machine. The system directs a port of the machine to be opened for a JIT access period. The system also directs the machine to alter security relating to applications allowed to execute on the machine for the JIT access period. During the JIT access period, the machine can be accessed via the port with the altered security relating to applications. After the JIT access period, the system directs the port to be closed and directs the security to return to the unaltered security.