if( ssn != null ) {
                ssn.removeAttribute( "npa-" + server );
            }
            if( sae.getNtStatus() == sae.NT_STATUS_ACCESS_VIOLATION ) {
                /* Server challenge no longer valid for
                 * externally supplied password hashes.
                 */
                resp.sendRedirect( req.getRequestURL().toString() );
                return;
            }

     * only to a server, this method determines if the server exists on the
     * network and is advertising SMB services. If this resource refers to
     * a workgroup, this method determines if the workgroup name is valid on
     * the local SMB network. If this <code>SmbResource</code> refers to the root
     * <code>smb://</code> resource <code>true</code> is always returned. If

    /**
     * @param key
     * @return
     * @throws SmbException
     */
    protected Response createNotification ( Long key ) throws SmbException {
        if ( key == null ) {
            // no valid header
            return null;
        }
        if ( this.smb2 ) {
            if ( key != -1 ) {
                return null;
            }