Technical Tip: Critical Extension warning blip in FortiGate GUI under System -> Certificates

[joser]

Description	This article describes the meaning of the warning 'Critical Extension'.
Scope	FortiGate v7.0 and above.
Solution	Some certificates, either default or imported, can show the yellow exclamation mark shown below: This warning is informational and no action is required. It indicates that the associated extension is marked critical, meaning, a certificate-using system will only accept the certificate if it recognizes the extension. If the extension is not critical then it can be ignored by the application. In Windows: Related document: Internet X.509 Public Key Infrastructure - Certificate and CRL Profile