Config.getInt( "jcifs.smb1.netbios.cachePolicy", 60 * 10 ) * 60; /* 10 hours */

    static NbtAddress[] dc_list = null;
    static long dc_list_expiration;
    static int dc_list_counter;

    private static NtlmChallenge interrogate( NbtAddress addr ) throws SmbException {
        UniAddress dc = new UniAddress( addr );
        SmbTransport trans = SmbTransport.getSmbTransport( dc, 0 );