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The transport level security protocol of the Tomcat server is configured in the <PRODUCT_HOME>/conf/tomcat/catalina-server.xml file. Note that the ssLprotocol attribute is set to "TLS" by default. 
See the following topics for detailed configuration options:

...

  1. Download TestSSLServer.jar from here.
  2. Execute the following command to test the transport:

    Code Block
    java -jar TestSSLServer.jar localhost 9443 
  3. The output of the command before and after disabling SSL version 3 is shown below.
    Before SSL  is disabled:

    Code Block
    Supported versions: SSLv3 TLSv1.0
    Deflate compression: no
    Supported cipher suites (ORDER IS NOT SIGNIFICANT):
      SSLv3
         RSA_EXPORT_WITH_RC4_40_MD5
         RSA_WITH_RC4_128_MD5
         RSA_WITH_RC4_128_SHA
         RSA_EXPORT_WITH_DES40_CBC_SHA
         RSA_WITH_DES_CBC_SHA
         RSA_WITH_3DES_EDE_CBC_SHA
         DHE_RSA_EXPORT_WITH_DES40_CBC_SHA
         DHE_RSA_WITH_DES_CBC_SHA
         DHE_RSA_WITH_3DES_EDE_CBC_SHA
         RSA_WITH_AES_128_CBC_SHA
         DHE_RSA_WITH_AES_128_CBC_SHA
         RSA_WITH_AES_256_CBC_SHA
         DHE_RSA_WITH_AES_256_CBC_SHA
      (TLSv1.0: idem)

    After SSL is disabled:

    Code Block
    Supported versions: TLSv1.0
    Deflate compression: no
    Supported cipher suites (ORDER IS NOT SIGNIFICANT):
      TLSv1.0
         RSA_EXPORT_WITH_RC4_40_MD5
         RSA_WITH_RC4_128_MD5
         RSA_WITH_RC4_128_SHA
         RSA_EXPORT_WITH_DES40_CBC_SHA
         RSA_WITH_DES_CBC_SHA
         RSA_WITH_3DES_EDE_CBC_SHA
         DHE_RSA_EXPORT_WITH_DES40_CBC_SHA
         DHE_RSA_WITH_DES_CBC_SHA
         DHE_RSA_WITH_3DES_EDE_CBC_SHA
         RSA_WITH_AES_128_CBC_SHA
         DHE_RSA_WITH_AES_128_CBC_SHA
         RSA_WITH_AES_256_CBC_SHA
         DHE_RSA_WITH_AES_256_CBC_SHA

...

Firefox 39.0 onwards does not allow to access Web sites that support DHE with keys less than 1023 bits (not just DHE_EXPORT). 768/1024 bits are considered to be too small and vulnerable to attacks if the hacker has enough computing resources. 

Tip

Tip: To use AES-256, the Java JCE Unlimited Strength Jurisdiction Policy files need to be installed. Downloaded them from http://www.oracle.com/technetwork/java/javase/downloads/index.html.

Tip

Tip: From Java 7, you must set the jdk.certpath.disabledAlgorithms property in the <JAVA_HOME>/jre/lib/security/java.security file to jdk.certpath.disabledAlgorithms=MD2, DSA, RSA keySize < 2048. It rejects all algorithms that have key sizes less than 2048 for MD2, DSA and RSA.