If this option is activated, the Intra2net system counts the login errors of each IP on all available protocols. If the threshold of 10 login errors is exceeded within 5 minutes, the IP will be blocked for 5 minutes for every further attempt to access any services. If multiple attempts are made, the blocking time is added up.

The access attempts of blocked IPs are logged with the identifier "BLOCKED_IP" in the messages log file.