First you need to log in to the server using Remote Desktop. Then open your FileZilla Server. Go to C:\Program Files\FileZilla Server\ then double-click on FileZilla Server Interface.exe. Now from FileZilla go to Edit->settings and scrolldown to Autoban and check the ‘Enable Automatic Bans’. Here, you can configure the number of attems to take before we ban an IP address and foe how long.