You can configure Linux to start the iucvconn_on_login script when a user establishes an SSH session with the terminal server.
The iucvconn_on_login script immediately calls iucvconn and connects the user to a target system. The iucvconn_on_login user cannot access ts-shell or any other shell on the terminal server. After a successful login to the terminal server, the user is redirected to the target system. With a suitable setup of the addressed terminal device on the target system, a login prompt for the target system follows.
For each target system to be reached through iucvconn_on_login, you must create a specific Linux user on the terminal server. The user name of this Linux user must match the z/VM® user ID that identifies the target system. The terminal ID on the target system is specified as a parameter when you establish the SSH session to the terminal server.