As the subject says, I have blacklisted an IP address but it is still getting through trying to register. Because registration via WAN is turned off, they can't make a phone call. Also, I am getting this message exactly every 8 minutes: The IP 220.127.116.11 has been blacklisted for 1800 sec. (Expires at: 2017/0212 23:56:41). Reason: Too many failed authentications! I have done these things: 1. Blacklisted the IP 2. Blocked the IP at the firewall None of these things have stopped these messages. Also, every 2 minutes, this IP tries to register with an extension which does get blocked but if the IP is blacklisted, how does it get this far?