*/
    boolean isRequireSecureNegotiate ();


    /**
     * Enable port 139 failover
     * 
     * Property <tt>jcifs.smb.client.port139.enabled</tt> (boolean, default false)
     * 
     * @return whether to failover to legacy transport on port 139
     */
    boolean isPort139FailoverEnabled ();


    /**
     *