SCCP Security

The SCCP ALG includes the following security features:

• Stateful inspection of SCCP control messages over TCP and validation of the message format, and message validity for the current call state. Invalid messages are dropped.
• Security policy enforcement between Cisco IP phones and Cisco CallManager
• Protect against call flooding by rate limiting the number of calls processed by the ALG
• Seamless failover of calls, including the ones in progress in case of J-series device failure in a clustered deployment.