FTP client block

From: Marco A. Ramos (mramos_at_sanyoval.net)
Date: 01/27/05

  • Next message: Marco A. Ramos: "RE: FTP client block" 
    To: <redhat-list@redhat.com>
Date: Thu, 27 Jan 2005 14:19:51 -0800

    Hello every one,

    Any idea will be very appreciative, because I’m stock with this problem,

    I develop a FTP client program (with gcc) and is work fine with 5 different
    entities (3 windows FTP server, and 2 NetWare FTP server), but when other
    Netware FTP server the client program is blocking at start to interact with
    the server, is like if the FTP server not respond, but if I try manually
    with shell the server woks fine, I try to send different command and
    nothing.

    (I have not access to the FTP server, it is a external company and they will
    not provide any help)

    This is a interaction using the Linux ftp client (from shell)

    [root@ramaclinux ftp]# ftp -d 172.64.165.34

    Connected to 172.64.165.34.

    220 FTP server (NetWare v4.11) ready.

    ---> AUTH GSSAPI

    500 'AUTH GSSAPI': command not understood.

    ---> AUTH KERBEROS_V4

    500 'AUTH KERBEROS_V4': command not understood.

    KERBEROS_V4 rejected as an authentication type

    Name (172.64.165.34:root): guest02

    ---> USER guest02 (it take like 5 seconds to respond)

    331 Password required for guest02.

    Password:

    ---> PASS XXXX

    230 Successful Login

    ---> SYST

    215 NetWare system type.

    Remote system type is NetWare.

    ftp> close

    ---> QUIT

    221 Goodbye.

    ftp> by

    As you can see the FTP server answer fine.

    This is an interaction from my FTP client FTP

    Conecting to 172.64.165.34 ...

    220 FTP server (NetWare v4.11) ready.

    ---> AUTH GSSAPI:

    And Never respond!!

    The tcpdump result for the fisrt example are:
    14:42:22.266330 192.168.1.3.45319 > 172.64.165.34.ftp: S
    923128954:923128954(0) win 5840 <mss 1460,sackOK,timestamp 484894093
    0,nop,wscale 0> (DF)

    14:42:22.290053 192.168.1.3.45319 > 172.64.165.34.ftp: . ack 1314115281 win
    5840 (DF)

    14:42:22.317446 192.168.1.3.45319 > 172.64.165.34.ftp: . ack 55 win 5840
    (DF) [tos 0x10]

    14:42:22.317833 192.168.1.3.45319 > 172.64.165.34.ftp: P 0:13(13) ack 55 win
    5840 (DF) [tos 0x10]

    14:42:22.351434 192.168.1.3.45319 > 172.64.165.34.ftp: P 13:31(18) ack 99
    win 5840 (DF) [tos 0x10]

    .

    .

    Continue…

    And for the FTP client program:

    14:45:49.447851 192.168.1.3.45366 > 172.64.165.34.ftp: S
    1146613991:1146613991(0) win 5840 <mss 1460,sackOK,timestamp 484914811
    0,nop,wscale 0> (DF)

    14:45:49.478695 192.168.1.3.45366 > 172.64.165.34.ftp: . ack 1314175633 win
    5840 (DF)

    14:45:49.506095 192.168.1.3.45366 > 172.64.165.34.ftp: . ack 55 win 5840
    (DF)

    14:45:49.506410 192.168.1.3.45366 > 172.64.165.34.ftp: P 0:12(12) ack 55 win
    5840 (DF)

    14:47:22.733207 192.168.1.3.45366 > 172.64.165.34.ftp: F 12:12(0) ack 55 win
    5840 (DF)

    This is the line where it block!!

    Any help,

    Thank you, regards.

     Marco Antonio Ramos 

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