The z/OS® UNIX INET daemon (inetd) can be configured to listen for requests for many different services. You can run inetd under a user identity with a SYSMULTI security label. Each connection to one of its ports causes it to issue the _poe() service and fork a new instance of the server configured to handle that service. The new connection is passed to the server. If a user ID for the forked server is configured in the inetd configuration file, that user ID must be authorized to the SERVAUTH NETACCESS profile for the network security zone containing the client IP address. If the forked server performs additional user login authentication, that user ID must also be permitted to the NetAccess profile.
The following z/OS CS servers are designed to be forked by inetd. They each perform additional user authentication.