[Freeswitch-users] How to stop SPAM calls?

[Malay Thakershi]

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 at 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.
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