Summary
Security is a major concern for any VoIP provider or PBX administrator. A single flaw in the security police can easily bankrupt a small company. Frauds spanning hundreds of thousands of dollars are quite common and you can easily find many cases in the news. A solid security implementation is key for any VoIP service. In this chapter, you learned how to apply firewall policies for OpenSIPS, block multiple failed authentication attempts, use PIKE to prevent SIP flooding, prevent DNS and registration poisoning, enable TLS for security and privacy, and install and configure the fraud detection module. Pay thorough attention to this chapter before implementing any OpenSIPS system. It can save you a lot of trouble and money.
In the next chapter, ...
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