public static String getDefaultSecret() {
        return JiveGlobals.getProperty("xmpp.multiplex.defaultSecret");
    }
Returns the default secret key that connection managers should present while trying to
establish a new connection.

@return the default secret key that connection managers should present while trying to
        establish a new connection.
xmppserver/src/main/java/org/jivesoftware/openfire/multiplex/ConnectionMultiplexerManager.java