Firewall rebooting randomly

Hi @RDSS 

Do you happen to observe the CPU or memory usage prior the reboot? You may want to check if there's any application crash during month of December with the following command:

diag deb config-error-log read | grep 2023-12

It is not possible to determine the root cause as of the information that you provided. We need to know what are the symptoms that causes the reboot (whether it is due to utilization or other factor). If you require further technical support, please do create a ticket in our FortiCare portal and our engineer can assist you via remote session and investigation based on the logs captured.

Hi @RDSS

1. Please use this knowledge base to monitor your firewall log. It is beneficial when an issue happens. Please follow the link and install the script. It has a lot of commands to get information automatically. 

https://community.fortinet.com/t5/FortiGate/Technical-Tip-FortiGate-monitoring-script/ta-p/193006

2. In addition, abnormal traffic can cause the system to crash in some cases. You should check what kind of traffic is at issue time. What is the abnormal one? Looping? Ddos? Is traffic bursting abnormally?

3. you can share the crashlog or console log. They are helpful to understand something.

Regards

Bill