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Problem accessing NAT'ed site (8 posts)

  • Started 16 years ago by ulfie22
  • Latest reply 16 years ago from Scott McGuire
  • ulfie22 Member

    I'm using Fetch 5.3. My web host just changed his network configuration so that it now uses network address translation behind his firewall. Fetch used to work just fine but now it doesn't.

    Here's a transcript of a session:

    tp> ftp zzzxxxyyy.com
    Connected to zzzxxxyyy.com.
    220 Welcome to NetSMART VA2 FTP service.
    Name (): name
    331 Please specify the password.
    Password:
    230 Login successful.
    Remote system type is UNIX.
    Using binary mode to transfer files.
    ftp> ls
    229 Entering Extended Passive Mode (|||51575|)
    500 Bad EPRT protocol.
    200 PORT command successful. Consider using PASV.
    150 Here comes the directory listing.
    ftp: poll timeout waiting before accept: Operation timed out
    426 Failure writing network stream.
    225 No transfer to ABOR.
    ftp>

    I've seen other references to a problem accessing NAT'ed servers. Is there a way to configure Fetch to get around this?

    Thanks!!

    Posted 16 years ago #

  • Scott McGuire Administrator

    Hi,

    Could you please try the following?

    In Fetch, go to the Fetch menu, choose Preferences, click the General tab, and make sure the"Use passive mode transfers (PASV)" checkbox is checked.

    Then try to connect to your server again.

    If that does not work, could you please show us the entire Fetch Transcript? (You can find it by choosing Fetch Transcript from the Window menu.)

    Thanks,

    Scott McGuire
    Fetch Softworks

    Posted 16 years ago #

  • ulfie22 Member

    Scott -

    Thank you for your replay, and Happy New year!!

    Here's the session transcript:

    USER XXXXXX
    331 Please specify the password.
    PASS
    230 Login successful.
    SYST
    215 UNIX Type: L8
    PWD
    257 "/www/servers/mdelapa"
    MACB ENABLE
    500 Unknown command.
    CWD 2007HolidayPhotos/
    250 Directory successfully changed.
    PWD
    257 "/www/servers/mdelapa/2007HolidayPhotos"
    PWD
    257 "/www/servers/mdelapa/2007HolidayPhotos"
    TYPE A
    200 Switching to ASCII mode.
    PASV
    227 Entering Passive Mode (10,10,22,51,27,183)
    Making data connection to 64.186.170.78 port 7095
    ABOR
    225 No transfer to ABOR.
    PORT 172,22,1,54,193,117
    200 PORT command successful. Consider using PASV.
    LIST -al
    ABOR
    ftp_list: 2,-30027 (state == GETTING_LIST)
    QUIT
    send_cmd():con_conn->Putline() returns 2,32767

    The IP address (64.186.170.78) is NAT'ed behind a firewall. It worked just fine prior to changing the server to a NAT address.

    Thanks again!

    Posted 16 years ago #

  • Scott McGuire Administrator

    Hi,

    Thanks for the transcript.

    Please try the following:

    * Go to the Fetch menu, and choose Preferences.
    * Click the General tab, and uncheck the "Use passive mode transfers" checkbox (yes, the opposite of what I asked you to do earlier).
    * Then click the Miscellaneous tab, and uncheck the "Use LIST - al command to reveal hidden files" checkbox.
    * Try connecting to the server again.

    Let us know if this helps or not (and if not, please send a Fetch transcript from the failed attempt).

    Thanks,

    Scott McGuire
    Fetch Softworks

    Posted 16 years ago #

  • ulfie22 Member

    Scott -

    Once again - thanks for the quick reply.

    It still did not work - here is the resulting log:

    Fetch 5.3 (5D161) Intel running on Mac OS X 10.5.1 (9B18) Intel English
    StuffIt Engine 0x820, StuffIt SDK Version 10.1.1b1
    Expires 01/10/2008 T
    Connecting to 64.186.170.78 port 21 (Mac OS X firewall is allowing connections) (1/2/08 2:18:55 PM)
    Connected to 64.186.170.78 port 21 (1/2/08 2:18:55 PM)
    220 Welcome to NetSMART VA2 FTP service.
    USER XXXXXXX
    331 Please specify the password.
    PASS
    230 Login successful.
    SYST
    215 UNIX Type: L8
    PWD
    257 "/www/servers/mdelapa"
    MACB ENABLE
    500 Unknown command.
    CWD 2007HolidayPhotos/
    250 Directory successfully changed.
    PWD
    257 "/www/servers/mdelapa/2007HolidayPhotos"
    PWD
    257 "/www/servers/mdelapa/2007HolidayPhotos"
    TYPE A
    200 Switching to ASCII mode.
    PORT 172,22,1,54,202,128
    200 PORT command successful. Consider using PASV.
    LIST
    ABOR
    ftp_list: 2,-30028 (state == GETTING_LIST)
    ftp_list: tw->port_retries == 0, retrying file list
    Connecting to 64.186.170.78 port 21 (Mac OS X firewall is allowing connections) (1/2/08 2:19:34 PM)
    Connected to 64.186.170.78 port 21 (1/2/08 2:19:34 PM)
    220 Welcome to NetSMART VA2 FTP service.
    USER XXXXXXX
    331 Please specify the password.
    PASS
    230 Login successful.
    SYST
    215 UNIX Type: L8
    PWD
    257 "/www/servers/mdelapa"
    MACB ENABLE
    500 Unknown command.
    CWD 2007HolidayPhotos/
    250 Directory successfully changed.
    PWD
    257 "/www/servers/mdelapa/2007HolidayPhotos"
    TYPE A
    200 Switching to ASCII mode.
    PASV
    227 Entering Passive Mode (10,10,22,51,42,47)
    Making data connection to 64.186.170.78 port 10799
    ABOR
    225 No transfer to ABOR.
    PORT 172,22,1,54,202,134
    200 PORT command successful. Consider using PASV.
    LIST
    Update check skipped at 01/02/2008 02:20 PM (next check after 01/02/2008 10:36 PM)
    ABOR
    ftp_list: 2,-30027 (state == GETTING_LIST)
    QUIT
    send_cmd():con_conn->Putline() returns 2,32767

    If it would help, I would be happy to give you credentials to access the machine so you can test more efficiently.

    Thanks again.

    Posted 16 years ago #

  • Jim Matthews Administrator

    Hi,

    Fetch is automatically trying the two commands that it can use to set up an FTP data transfer, PASV (passive mode) and PORT (active mode), but both are failing.

    PASV is failing because the server is saying "Connect to me at 10.10.22.51", its private NAT address. Fetch is smart enough to know that that will never work, so it connects to 64.186.170.78, the server's public address, instead, but that doesn't work either. To get PASV to work you would need to configure the NAT gateway differently, e.g. so that connections to the public address are automatically forwarded to the server. I'd recommend contacting the web host administrator about that.

    PORT is failing also, but I don't see an obvious reason why. It could be related to the server being switched to NAT, or it could be something on your end. If you send the login information to bugs at fetchsoftworks dot com we'll try to see if we can connect, which would help pin down where the problem is.

    Thanks,

    Jim Matthews
    Fetch Softworks

    Posted 16 years ago #

  • ulfie22 Member

    Just wanted to let you guys know the problem is solved and your help was terrific. Keep up the good work!!

    Posted 16 years ago #

  • Scott McGuire Administrator

    Hi,

    Good to hear - thanks for the followup!

    Best,

    Scott McGuire
    Fetch Softworks

    Posted 16 years ago #

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