Security system values: Transport Layer Security (TLS) protocols

The Transport Layer Security (TLS) protocols system value specifies the Transport Layer Security and Secure Sockets Layer (SSL) protocols supported by the System TLS.

Quick reference
Location From IBM Navigator for i, select Configuration and Service > System Values. Click on Security and click Properties, then select the System TLS tab.
Special authority
Notes:
  1. Start of changeTo view this system value, you must have Input/output (I/O) system configuration (*IOSYSCFG) special authority or have access to the QIBM_IOSYSCFG_VIEW function usage identifier.

    If you do not have the required authority, the system value is not displayed.

    End of change
  2. To change this system value, you must have Input/output (I/O) system configuration (*IOSYSCFG), all object (*ALLOBJ), and security administrator (*SECADM) special authorities.
Default value Use the protocols determined by the system for the release.
Changes take effect Immediately for all subsequent System TLS sessions.
Lockable Yes.
Lockable system value
(See Lock function of security-related system values for details.)

What can I do with this system value?

The System TLS property page lists all the TLS protocol versions supported by the System TLS.

You have the following options:

Use the protocols determined by the system for the release (*OPSYS)
This is the default setting.
Specify the protocols to be supported
If you select this option, you must select at least one of the following options:
  • Transport Layer Security version 1.3 (*TLSV1.3)
  • Transport Layer Security version 1.2 (*TLSV1.2)
  • Transport Layer Security version 1.1 (*TLSV1.1)
  • Transport Layer Security version 1.0 (*TLSV1)
  • Secure Sockets Layer version 3.0 (*SSLV3)
Note: This system value is not supported on systems running IBM i V5R4, or earlier.