Responsive Firewall question

I finally decided to install the responsive firewall (13.0.39.2) and would like to know more on how it blocks registration attempts. The responsive firewall is enabled for chansip and according to the documentation it’s supposed to block invalid incoming connection attempts. First for a short time and then for 24 hours.

But the log below shows continued attempts from the same IP without getting blocked. Is it working as it should and the IP will eventually get blocked or is he avoiding getting blocked by changing the port every time.

[2016-10-17 23:05:36] NOTICE[1675]: chan_sip.c:28465 handle_request_register: Registration from ‘“681” sip:[email protected]:5060’ failed for ‘212.83.146.40:5111’ - Wrong password

[2016-10-17 23:06:44] NOTICE[1675]: chan_sip.c:28465 handle_request_register: Registration from ‘“1330” sip:[email protected]:5060’ failed for ‘212.83.146.40:5092’ - Wrong password

[2016-10-17 23:30:51] NOTICE[1675]: chan_sip.c:28465 handle_request_register: Registration from ‘“1531” sip:[email protected]ySIPserverIP:5060’ failed for ‘212.83.146.40:5079’ - Wrong password

Never mind. Seems to be working like it should. According to the documentation it takes 49 attempts.