This option is available only if licensed. This configuration option sets the server in read-only mode. By default, this option is off. To enable this option, add READONLY_SERVER YES to ctsrvr.cfg.
This option can also be enabled or disabled at run-time by calling the ctSETCFG() function or using the ctadmn utility: Select menu option 10 and then menu option 10 (Change the specified configuration option) again to change a server configuration option value.
Runtime changes to this setting are persisted as documented in Dynamic Configuration Changes Now Persisted in New ctsrvr.cfg Location and Default Additions.