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Hierarchy Level


Specify the accepted SSL protocol version.

You can specify the SSL/TLS protocol version the SRX Series device uses to negotiate in SSL connections.


  • all—Accept all versions of TLS. This is enabled by default.

  • TLS version 1.0—Accept TLS version 1.0. It provides secure communication over networks by providing privacy and data integrity between communicating applications

  • TLS version 1.1—Accept TLS version 1.1. This enhanced version of TLS provides protection against cipher-block chaining (CBC) attacks.

  • TLS version 1.2 —Accept TLS version 1.2. This enhanced version of TLS provides improved flexibility for negotiation of cryptographic algorithms.

  • TLS version 1.2 and lower —Accept TLS version 1.2 and lower.

  • TLS version 1.3 —Accept TLS version 1.3. This enhanced version of TLS provides improved security and better performance.

Required Privilege Level

services—To view this statement in the configuration.

services-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 12.1X44-D10. The tls11 and tls12 options are introduced in 15.1X49-D30.