FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
aahmadbasri
Staff
Staff
Article Id 343991
Description This article describes the notification 'Unable to connect to FortiGuard servers' which is usually seen when there are issues connecting to FortiGuard servers.
Scope FortiGate.    
Solution

The error 'Unable to connect to FortiGuard servers' will generally be shown in the FortiGate GUI when there is a connectivity issue to reach to FortiGuard servers. 

 

KB_Sept_1_1.png

 

In a normal environment with internet access, to remove the error, there is a need to fix the fortiGuard connectivity issue by following this related KB article: Troubleshooting Tip: Unable to connect to FortiGuard servers

 

It is also possible to run the below debug commands and open a case with TAC.

 

di de reset

diagnose debug application update -1

diagnose debug enable

 

However, in an air-gap environment, it is expected that the FortiGate will not be able to connect to fortiGuard servers. 

The notification will always be shown, and will not be able to disable.