Hi, sometimes i receive these users trying to make a call (injection) in my FreeSwitch

I already use events to know what's happen in the FS.

sofia::register_failure - to figure a invalid register
sofia::gateway_state - when a gateway comes down

sofia::gateway_add - when someone add a gateway (daemon)

sofia::gateway_delete - when someone delete a gateway (daemon)

[NOTICE] switch_channel.c:1075 New Channel sofia/profile_1/'o[97bf779b-2e0d-e611-be46-00145ec01e69]

[DEBUG] switch_core_session.c:1061 Send signal sofia/profile_1/'o[BREAK]

[DEBUG] switch_core_state_machine.c:472 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) Running State Change CS_NEW

[DEBUG] sofia.c:8848 sofia/profile_1/'or''='@1.2.3.4>@nowhere receiving invite from 62.4.6.227:5076 version: 1.5.final git 6a2fc5e 2015-05-28 17:35:17Z 64bit

[DEBUG] sofia.c:9015 IP 62.4.6.227 Rejected by acl "domains". Falling back to Digest auth.

[DEBUG] switch_core_state_machine.c:491 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State NEW

[DEBUG] switch_core_session.c:1061 Send signal sofia/profile_1/'o[BREAK]

[DEBUG] sofia.c:2065 detaching session 97bf779b-2e0d-e611-be46-00145ec01e69

[WARNING] switch_core_state_machine.c:572 97bf779b-2e0d-e611-be46-00145ec01e69 sofia/profile_1/'or''='@1.2.3.4>@nowhere Abandoned

[NOTICE] switch_core_state_machine.c:575 Hangup sofia/profile_1/'o[CS_NEW] [WRONG_CALL_STATE]

[DEBUG] switch_channel.c:3242 Send signal sofia/profile_1/'o[KILL]

[DEBUG] switch_core_session.c:1396 Send signal sofia/profile_1/'o[BREAK]

[DEBUG] switch_core_state_machine.c:472 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) Running State Change CS_HANGUP

[DEBUG] switch_core_state_machine.c:735 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) Callstate Change DOWN -> HANGUP

[DEBUG] switch_core_state_machine.c:737 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State HANGUP

[DEBUG] mod_sofia.c:413 Channel sofia/profile_1/'or''='@1.2.3.4>@nowhere hanging up, cause: WRONG_CALL_STATE

[DEBUG] switch_core_state_machine.c:60 sofia/profile_1/'or''='@1.2.3.4>@nowhere Standard HANGUP, cause: WRONG_CALL_STATE

[DEBUG] switch_core_state_machine.c:737 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State HANGUP going to sleep

[DEBUG] switch_core_state_machine.c:504 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State Change CS_HANGUP -> CS_REPORTING

[DEBUG] switch_core_session.c:1396 Send signal sofia/profile_1/'o[BREAK]

[DEBUG] switch_core_state_machine.c:472 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) Running State Change CS_REPORTING

[DEBUG] switch_core_state_machine.c:823 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State REPORTING

[DEBUG] switch_core_state_machine.c:104 sofia/profile_1/'or''='@1.2.3.4>@nowhere Standard REPORTING, cause: WRONG_CALL_STATE

[DEBUG] switch_core_state_machine.c:823 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State REPORTING going to sleep

[DEBUG] switch_core_state_machine.c:498 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State Change CS_REPORTING -> CS_DESTROY

[DEBUG] switch_core_session.c:1396 Send signal sofia/profile_1/'o[BREAK]

[DEBUG] switch_core_session.c:1623 Session 139 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) Locked, Waiting on external entities

[NOTICE] switch_core_session.c:1641 Session 139 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) Ended

[NOTICE] switch_core_session.c:1645 Close Channel sofia/profile_1/'o[CS_DESTROY]

[DEBUG] switch_core_state_machine.c:626 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) Running State Change CS_DESTROY

[DEBUG] switch_core_state_machine.c:636 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State DESTROY

[DEBUG] mod_sofia.c:323 sofia/profile_1/'or''='@1.2.3.4>@nowhere SOFIA DESTROY

[DEBUG] switch_core_state_machine.c:111 sofia/profile_1/'or''='@1.2.3.4>@nowhere Standard DESTROY

[DEBUG] switch_core_state_machine.c:636 (sofia/profile_1/'or''='@1.2.3.4>@nowhere) State DESTROY going to sleep

Is there a Event (or another way), to know when someone is trying to make a call without register, so i can count how many times some IP try to do this and add it in a firewall.