Web Monitoring Question for Website Uptime

[UserSN]

I've setup website monitoring by adding a host and then configuring various web scenario's with the website URL's with appropriate HTTPS syntax and status code 200. Today I had 1 website that had it's SSL certificate expired so it was showing that warning page on all modern browsers. I'm not sure if a failed SSL website still throws a status code of 200, if not then my questions is why zabbix was showing the website was up, if it does then I understand why but is there some methodology to check this?

[Bartosz Mickiewicz]

Is there a possibility that your web scenario uses HTTP instead of HTTPS?
Curl should return a similar error. Can you share the web scenario that was used?

Also, you can monitor SSL Certs with agent 2 and this template.

[UserSN]

I've installed the Zabbix agent v 6.2.3 for Windows not agent 2, is there a difference?

The web scenario has the following configuration:
URL: https://www.example.com
Timeout: 5s
Required Status codes: 200

[Bartosz Mickiewicz]

The template calls explicitly for agent 2, you can see the comparison here. Recreated your problem using expired.badssl.com, if you don't check "SSL verify peer" in Web Scenario -> Authentication, Zabbix probably doesn't check if the cert is correct.

[UserSN]

So, i just realized that the agents should not be playing a part in my setup because I've created a host directly on the Zabbix server for the sole purpose of website monitoring so it's not a windows agent at all.