The act of trying
repeatedly to connect to an unavailable FTP server with little or no time between connection attempts. It can be compared to
repeatedly hitting the "redial" button on a
telephone when dialing a phone number that is busy until the other phone is no longer busy
Most FTP sites have policies against hammering and require FTP clients to set retry times at
specific intervals,
commonly at least 120 seconds between each attempt to connect. Most FTP sites can also monitor for devices that hammer, and once detected the server will ban access to the offending IP address either permanently or for a
limited amount of time.