What are two key performance parameters to monitor on FortiGate, in addition to CPU and memory usage?

Monitoring the number of SSL sessions and the number of active VPN tunnels on a FortiGate device is essential for several reasons tied to network security and performance management. SSL sessions are indicative of secure connections established through the firewall, facilitating the encrypted transmission of data. A high number of SSL sessions could imply significant secure traffic, necessitating scrutiny to ensure the device can handle the load effectively.

Active VPN tunnels also play a critical role in secure remote access to the corporate network, and monitoring these tunnels helps assess the demand for remote connectivity and the performance of the VPN service. An increase or decrease in VPN usage can affect network stability and may indicate trends in user behavior or potential security concerns.

These parameters provide insights into how effectively the firewall is managing secure connections and the overall security posture of the network, making them important metrics alongside CPU and memory usage.