Use the ssldisablelegacytls option to disallow the use of SSL protocols that are lower than TLS 1.2.
This option is valid for all supported clients.
Place this option in the dsm.sys file. You can also set this option in the GUI by selecting the Require TLS 1.2 or above check box on the Communication tab of the Preferences editor. You cannot set this option on the command line.
Place this option in the client options (dsm.opt) file. You can also set this option in the GUI by selecting the Require TLS 1.2 or above check box on the Communication tab of the Preferences editor. You cannot set this option on the command line.