General information about REXECD

The remote execution server allows execution of a TSO batch command that is received from a remote host. REXECD supports both the remote execution command (REXEC) and remote shell (RSH) client protocols.
Note: When the REXECD server is active, it has outstanding listens on Ports 512 and 514. If you want to have a concurrent server for the z/OS® UNIX REXECD or RSHD daemons, then configure them to use different ports.