Quiz: TLS

One correct answer

systemctl is-active nginx prints active, while curl https://secure.lab.test/ prints SSL certificate problem: certificate has expired. Where do you look for the cause?

• A In the firewall — port 443 is closed.
• B In nginx's error.log — it refused the request.
• C In the certificate the server serves — its notAfter.
• D In the site's root — there is no index.html.