ADMIN_RESTRICTIONS_listener_name=on

Setting ADMIN_RESTRICTIONS_listener_name=on disables the runtime

modification of parameters in listener.ora. That is, the listener will refuse to

accept SET commands that alter its parameters. To change any of the parameters in

listener.ora, including ADMIN_RESTRICTIONS_listener_name itself, modify

the listener.ora file manually and reload its parameters (with the RELOAD

command) for the new changes to take effect without explicitly stopping and

restarting the listener.

The parameter is useful if the listener is not

password-protected.