My ftp server (v 3.3.5) runs on average for about a week without issues. I would say I get around 30 logins per week.
Then from out of nowhere, I get this error message in red letters, "An error arose on ssh port 22 (error code:121)".
When this error occurs, no one can log in and access there files. Any login attempts just timeout.
In order to restore the server to working mode, I have to restart the PC.
Before this error, I get a few people trying to "hack" there way onto the server through port 22. They always fail and end up getting automatically banned after 7 attempts.
I'm not quite sure whats causing this...
Any help would be much appreciated !