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SCCP traffic is dropped by Security Gateway Technical Level
Symptoms
  • "Attack Info - IP <IP address> is trying to register as IP <IP address>" log in SmartView Tracker on SCCP traffic drop when client SCCP traffic is NATed behind another IP address.

  • Setting skinny_block_3rd_party_registration parameter to false does not take effect on the Gateway.
Cause

There is an internal protection on the Security Gateway to prevent clients from registering for SCCP with an IP address other than the client IP address. This protection was documented as skinny_block_3rd_party_registration and is located in the objects_5_0.C and classes.C files. The protection is obsolete as it was renamed to sk_block_3rd_party_registration.


Solution
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