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    Firewall and ftp: Can't build data connection: Cannot connect to dest socket

    • Article Type: General
    • Product: Aleph
    • Product Version: 18.01

    Description:
    We are trying out the new service pack process for the first time and notice that our firewall is causing the process to fail.

    We opened the ftp port (21) and we tried the download again, but it still failed.

    Resolution:
    This is what I get now on your server:
    cat-a18(2) >>ftp ftp.exlibris.co.il
    Connected to ftp.exlibris.co.il.
    220 SurgeFTP ftp.exlibris.co.il (Version 2.3a1)
    Name (ftp.exlibris.co.il:aleph): ver18_sp
    331 Password required for ver18_sp.
    Password:
    230-Welcome to aleph18 SP dir
    230 User ver18_sp logged in.
    Remote system type is UNIX.
    Using binary mode to transfer files.
    ftp> ls
    200 PORT command successful.
    425 Can't build data connection: Cannot connect to dest socket 160.36.192.200:37138 SSLTCP:394:connect
    tcp:110:Connection timed out .
    ftp>

    That means the ftp do get connected (port is open) but the ftp get rule is blocked.
    You need to ask your UNIX admin to open the ftp service (not port) on your FW and retry.


    • Article last edited: 10/8/2013