Really Simple SSL: your WordPress website SSL in one click
Identify and fix vulnerabilities in your SSL certificates - Help Net Security
SSL Security Check Sensor | PRTG Manual
How To Scan and Check Your Website Security - Tech Junkie
Online Tool to Test SSL, TLS and Latest Vulnerability - Geekflare
Messages "Certificate verification problem detected" and "Cannot guarantee authenticity of the domain to which encrypted connection is established" when trying to open a website
Online Tool to Test SSL, TLS and Latest Vulnerability - Geekflare
Why you should use SSL inspection | FortiGate / FortiOS 5.6.0