ssl_cipherspecs - Supported cipher specifications at the server configuration parameter

This configuration parameter specifies the cipher suites that the server allows for incoming connection requests when using the Transport Layer Security (TLS) protocol. This parameter also affects TLS communication between HADR Primary and Standby servers.

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 [TLS_RSA_WITH_AES_256_CBC_SHA; TLS_RSA_WITH_AES_128_CBC_SHA; TLS_RSA_WITH_AES_256_GCM_SHA384; TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384; TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384; TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384; TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384; TLS_RSA_WITH_AES_256_CBC_SHA256; TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA; TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA; TLS_RSA_WITH_AES_128_GCM_SHA256; TLS_RSA_WITH_AES_128_CBC_SHA256; TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256; TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256; TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256; TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256; TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA; TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA]

You can specify multiple cipher specifications, such as TLS_RSA_WITH_AES_256_CBC_SHA or TLS_RSA_WITH_AES_128_CBC_SHA. They must be separated by a comma (,) with no space either before or after the comma.

During a TLS handshake, if null or multiple values are specified, the client and the server negotiate and find the most secure cipher suites to use. If no compatible cipher suites is found, the connection fails. You cannot prioritize the cipher suites by specifying one before the another.

If you set ssl_versions to TLSV12, the following values are valid for ssl_cipherspecs.
  • TLS_RSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  • TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  • TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  • TLS_RSA_WITH_AES_256_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  • TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  • TLS_RSA_WITH_AES_256_CBC_SHA
  • TLS_RSA_WITH_AES_128_GCM_SHA256
  • TLS_RSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  • TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  • TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  • TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  • TLS_RSA_WITH_AES_128_CBC_SHA