The server, sshd2, listens on a configured TCP port (the
default is 22) and creates processes to handles connections from users.
The server must be allowed to listen on port 22 (or whichever the
configured Secure Shell port is). If the installation controls access to
TCP/IP stacks, ports, or networks, the user account under which the
master AS is run must be given sufficient authorization. The resources
in question belong to the SERVAUTH class.
If RESTRICTLOWPORTS is specified in IPCONFIG or
TCPCONFIG, and SAF authorization (see above) is not used, the
server must be APF-authorized.