2.9 Enabling Perfect Forward Secrecy

For information about Perfect Forward Secrecy and prerequisites for enabling it, see Section 7.3, Enabling Perfect Forward Secrecy.

  1. Change to the Tomcat configuration directory:

    Linux: /opt/novell/nam/adminconsole/conf

    Windows Server 2012: \Program Files (x86)\Novell\Tomcat\conf

  2. Open the server.xml file. Search for the cipher attribute in the <Connectors> element and modify the list to include only the following cipher suites:

    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLS_RSA_WITH_AES_256_CBC_SHA256
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
TLS_DHE_DSS_WITH_AES_256_CBC_SHA256
TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
TLS_DHE_DSS_WITH_AES_128_CBC_SHA256

    For a detailed sample, see Section 2.17, Samples of Recommended Settings in Configuration Files.

  3. Add attribute useServerCipherSuitesOrder and set its value to true:

    useServerCipherSuitesOrder="true"