Anonymous SIP user

ada yang berusaha register ke elastix, bagaimana melakukan stop atau block untuk user yang coba-coba masuk. saya router pakai mikrotik RB450, saya sudah disable nat untuk port tersebut, tetapi masih jalan log nya sampai saat ini.

[2017-06-06 14:05:44] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“9836” sip:9836@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10358’ - Wrong password
[2017-06-06 14:05:47] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“9895” sip:9895@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10173’ - Wrong password
[2017-06-06 14:05:49] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“2968” sip:2968@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:5085’ - Wrong password
[2017-06-06 14:05:49] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“2709” sip:2709@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:5077’ - Wrong password
[2017-06-06 14:05:49] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“615” sip:615@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10010’ - Wrong password
[2017-06-06 14:05:52] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“6060” sip:6060@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10365’ - Wrong password
[2017-06-06 14:05:52] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“8024” sip:8024@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10361’ - Wrong password
[2017-06-06 14:05:52] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“1001” sip:1001@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:5078’ - Wrong password
[2017-06-06 14:05:52] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“747” sip:747@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10360’ - Wrong password
[2017-06-06 14:05:52] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“488” sip:488@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:5081’ - Wrong password
[2017-06-06 14:05:53] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“701” sip:701@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:5085’ - Wrong password
[2017-06-06 14:05:53] WARNING[14171][C-00004ed1]: func_presencestate.c:132 presence_read: PRESENCE_STATE unknown
[2017-06-06 14:05:54] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“4781” sip:4781@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10363’ - Wrong password
[2017-06-06 14:05:55] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“07” sip:07@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10358’ - Wrong password
[2017-06-06 14:05:56] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“15425” sip:15425@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:5070’ - Wrong password
[2017-06-06 14:05:57] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“8283” sip:8283@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10360’ - Wrong password
[2017-06-06 14:06:00] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“901” sip:901@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10357’ - Wrong password
[2017-06-06 14:06:00] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“813” sip:813@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10367’ - Wrong password
[2017-06-06 14:06:01] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“600” sip:600@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10361’ - Wrong password
[2017-06-06 14:06:01] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“874” sip:874@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10020’ - Wrong password
[2017-06-06 14:06:02] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“131” sip:131@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10039’ - Wrong password
[2017-06-06 14:06:02] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“1932” sip:1932@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10356’ - Wrong password
[2017-06-06 14:06:02] NOTICE[2283]: chan_sip.c:28413 handle_request_register: Registration from ‘“4501” sip:4501@[202.12.1.2:5090]:5060’ failed for ‘1.1.1.1:10368’ - Wrong password

bisa coba pake fail2ban mas… pernah di bahas di thread: