DB2 10.5 for Linux, UNIX, and Windows

ssl_versions - Supported SSL versions at the server configuration parameter

This configuration parameter specifies Secure Sockets Layer (SSL) and Transport Layer Security (TLS) versions that the server supports for incoming connection requests.

Configuration type

Database manager

Applies to

Database server with local and remote clients
Database server with local clients
Partitioned database server with local and remote clients

Parameter type

Configurable

Default [range]

Null [TLSv1,TLSv12]

If you set the parameter to null or TLSv1, the parameter enables support for TLS version 1.0 (RFC2246) and TLS version 1.1 (RFC4346).

Note: During SSL handshake, the client and the server negotiate and find the most secure version to use either TLS version 1.0 or TLS version 1.1. If there is no compatible version between the client and the server, the connection fails. If the client supports TLS version 1.0 and TLS version 1.1, but the server support TLS version 1.0 only, then TLS version 1.0 is used.

If you set the parameter to TLSv12 (RFC5246), the parameter enables support for TLS version 1.2. This setting is required to comply with NIST SP 800-131A.

If you set the parameter to TLSv12 and TLSv1, the parameter enables support for TLS version 1.2 with the option to fall back on TLS version 1.0 and 1.1.