Hello, Since last few days my freeswitch server receives SPAM calls. 25 to 30 calls at the same time. It makes my mod_managed program crash. Unlike regular phone numbers in US, these seem to come from sip IP addresses. When I see location of these IP addresses, most of them seem to be from China. Sample from CDR: <caller_profile> <username>sip</username> <dialplan>XML</dialplan> <caller_id_name>sip</caller_id_name> <ani></ani> <aniii></aniii> <caller_id_number>sip</caller_id_number> <network_addr>113.105.152.220</network_addr> <rdnis>1442073479999</rdnis> <destination_number>1056</destination_number> <uuid>bef84579-d25a-ab4b-aa52-dbcf9d7509be</uuid> <source>mod_sofia</source> <context>default</context> <chan_name>sofia/sipinterface_1/sip@113.105.152.220</chan_name> </caller_profile> I am only expecting call from regular phone lines from USA. I use Vitelity and I have secured my Vitelity configuration (SOFIA) with secret code provided by them. How do I stop these anonymous SIP callers from crashing my system? Please help. Thank you.