What causes a web browser to display a certificate warning when using Secure Sockets Layer (SSL) deep inspection with the FortiGate CA certificate?

Question

Accepted Answer

FortiGate is using a CA that is not trusted by the web browser.

Answer

The temporary certificate makes FortiGate behave like a man-in-the-middle (MITM) attack.

Answer

FortiGate is unable to decrypt the SSL-encrypted traffic.

Answer

The browser does not support SSL deep inspection.

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