I cannot handle this problem. This message keeps appearing.

[marcus_chang]

My configuration is as follows:
Ubuntu 22.04 + Liunx 1.8.2 FileZilla Server
My message keeps repeating the following content, but the FTP function is working.

1.png (53.38 KiB) Viewed 316 times

This issue occurs when I set the IP in the firewall settings to not allow external connections. However, I don't receive it when there are no restrictions. This problem has been bothering me, preventing my log from obtaining normal login information or warning messages. Can anyone help me solve this issue?

If there are any inaccuracies in the translations, please let me know. tks guys.

[botg]

Something is regularly connecting to the server only to soon after drop the connection. You can see the client's IP address in the log to figure out where these connections are coming from.

[marcus_chang]

Thank you very much for your response. Through the logs you mentioned, I identified the source of the problem and resolved it on my own. The logs now look much cleaner.