Change to the Tomcat configuration directory:
/opt/novell/nam/adminconsole/conf
In the server.xml file, search for the sslProtocol attribute and make the following change:
sslProtocol="TLSv1.2" sslEnabledProtocols="SSLv2Hello,TLSv1.1,TLSv1.2"
For more information, see the overview of Strengthening TLS/SSL Settings.