Verify that both SSL-VPN and IPsec tunnels re-establish correctly and pass traffic according to policy. Conclusion
Fortigate 7.0.9 is a "workhorse" firmware. It isn't flashy, but it is built to provide the uptime and security required for medium-to-large enterprise networks. For administrators still on the 6.4 branch or early 7.0 versions, 7.0.9 represents a highly stable landing spot before eventually making the jump to the 7.2 or 7.4 "Feature" releases.
Addressal of issues where the wad process (proxy daemon) consumed excessive CPU, which previously led to "Conserve Mode" in high-traffic environments. fortigate 7.0.9
Download a full configuration backup (including scripts/local certs) before hitting the upgrade button.
Ensure your endpoints are running a compatible version (generally 7.0.x or higher) to avoid ZTNA or VPN disconnects. Verify that both SSL-VPN and IPsec tunnels re-establish
Resolving kernel panics, memory leaks, and proxy-related crashes.
Optimization of the web-based management interface, particularly when viewing large firewall policy sets or logs. 3. Critical Security Considerations For administrators still on the 6
Use the Fortinet Upgrade Path Tool . Moving from 6.4.x or 7.0.5 directly to 7.0.9 without following the recommended intermediate steps can corrupt your configuration file.
Fixing vulnerabilities found in previous iterations.