Introduction to SSL:npn() in FortiADC
FortiADC devices are pivotal in managing and optimizing application traffic. One crucial aspect of their function is handling SSL/TLS protocols, ensuring secure communication channels. A feature relevant to these operations is the SSL:npn() function. This guide explores its purpose, usage, and implementation in FortiADC.
What is SSL:npn()?
SSL:npn() is a function that retrieves the next protocol negotiation (NPN) string. If no NPN is applicable, it simply returns false. Understanding its role is essential for IT professionals handling SSL configurations in FortiADC environments.
Syntax and Arguments
Using the SSL:npn() function is straightforward:
SSL:npn()
The function does not require any arguments, making it simple to deploy in relevant scenarios.
Events Applicable
The SSL:npn() function is used within specific events in the SSL handshake process:
- CLIENTSSL_HANDSHAKE
- SERVERSSL_HANDSHAKE
- CLIENTSSL_RENEGOTIATE
- SERVERSSL_RENEGOTIATE
This adaptability ensures that whether during the initial handshake or a renegotiation phase, the function can effectively manage protocol negotiation.
Example Usage
Consider an example where SSL:npn() is implemented:
when CLIENTSSL_HANDSHAKE { npn = SSL:npn() }
In this scenario, during the client-side SSL handshake, the next protocol negotiation string is retrieved and assigned to the variable npn.
Supported Versions
The SSL:npn() function is available in FortiADC version 5.0.x and later, ensuring a broad range of compatibility for current and legacy systems.
Conclusion
Understanding and implementing the SSL:npn() function is integral to optimizing SSL configurations in FortiADC systems. Its role in managing protocol negotiations ensures secure and efficient communications. With this knowledge, you can enhance network security and performance effectively.
For more detailed information, refer to the official documentation here.