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    Random people connecting to server?


    I have a Filezilla private FTP server and am using it to transfer files with one other person. Lately I have been getting this:

    Code:
    (000022)4/24/2012 21:03:10 PM - (not logged in) (82.212.73.3)> Connected, sending welcome message...
    (000022)4/24/2012 21:03:10 PM - (not logged in) (82.212.73.3)> 220-FileZilla Server version 0.9.41 beta
    (000022)4/24/2012 21:03:10 PM - (not logged in) (82.212.73.3)> 220-written by Tim Kosse (Tim.Kosse@gmx.de)
    (000022)4/24/2012 21:03:10 PM - (not logged in) (82.212.73.3)> 220 Please visit http://sourceforge.net/projects/filezilla/
    (000022)4/24/2012 21:03:11 PM - (not logged in) (82.212.73.3)> EHLO [82.212.73.3]
    (000022)4/24/2012 21:03:11 PM - (not logged in) (82.212.73.3)> 500 Syntax error, command unrecognized.
    (000022)4/24/2012 21:03:11 PM - (not logged in) (82.212.73.3)> HELO [82.212.73.3]
    (000022)4/24/2012 21:03:11 PM - (not logged in) (82.212.73.3)> 500 Syntax error, command unrecognized.
    (000022)4/24/2012 21:03:12 PM - (not logged in) (82.212.73.3)> AUTH LOGIN
    (000022)4/24/2012 21:03:12 PM - (not logged in) (82.212.73.3)> 504 Auth type not supported
    (000022)4/24/2012 21:04:10 PM - (not logged in) (82.212.73.3)> 421 Login time exceeded. Closing control connection.
    (000022)4/24/2012 21:04:10 PM - (not logged in) (82.212.73.3)> disconnected.
    And then a reconnect under a diff IP and the same commands issued. How can I prevent this from happening and only allow authorized users?
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    Devshed Supreme Being (6500+ posts)

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    The log messages indicate that the server is only allowing authorized users.

    If the one other person you're sharing with has a static IP address you could configure your firewall to prevent incoming connections on port 21 from all IP addresses except your friend's. Otherwise, there's not much you can easily do nor any particular reason to do it.
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    There are bots scanning ips all day, when it gets a reply back they start trying to login and gain access. As stated before you can close out the ports to all IPs except your friends.

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