After 4 client connection failures (Error with decrypting, wrong stuffs, etc) the IP was blocked by RB until the server restarted. Now after 15 minutes this blacklist will keep getting cleaned by a parallel timer.
You also have the ability to view the blocked IPs and also unblock with commands, and also with console commands
/blip ip - Unblock IP
/bliplist - Lists you the ips
Console command: rb.blip ip (You can enter bullshit...