FTP user can not connect to the proxied server on ispconfig multiserver with a reverse proxy

Discussion in 'Installation/Configuration' started by mike.smith, May 1, 2023.

  1. mike.smith

    mike.smith New Member

    I'm using an ispconfig multiserver with a proxy server at front and some servers at the back in a private network
    When I create an ftp user on the proxy server(master server), the user can connect to it, but when I change the server to a backend server(proxied server) or create a new ftp user on it, the server responds "530 Login authentication failed"

    This is the output of the FileZilla logs:

    Status: Connecting to MyIP...
    Status: Connection established, waiting for welcome message...
    Status: Initializing TLS...
    Status: TLS connection established.
    Command: USER user1
    Response: 331 User user1 OK. Password required
    Command: PASS ********
    Response: 530 Login authentication failed
    Error: Critical error: Could not connect to server​

    Can anybody help me?
  2. ahrasis

    ahrasis Well-Known Member HowtoForge Supporter

    My best guess is your credential as that error is common for it.
  3. mike.smith

    mike.smith New Member

    My credential doesn't have any problem because as I said, when I change the server to front server without any changes in the username or password, the user can connect to it without any problems but when I change the server to backend server, "Login authentication failed" error occurs
  4. ahrasis

    ahrasis Well-Known Member HowtoForge Supporter

    I would check whether I am connected to the backend server and whether I did the proxy right for ftp.
  5. mike.smith

    mike.smith New Member

    Thank's for your reply ahrasis
    I solved my problem. I forgot to set the NAT rule for FTP connections.
    ahrasis likes this.

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