Communication Security
SSL Certificate Check
Learn how to verify your SSL certificate validity, the importance of an HTTPS connection, and the steps to fix common errors. Protect your visitors and your data.
What this test checks
This test checks that your SSL certificate is valid, not expired, and that the server responds correctly on port 443 (HTTPS). An SSL certificate is essential to encrypt exchanges between your visitors and your server, and to avoid security warnings in browsers.
Our recommendation
If the test fails, renew your SSL certificate with your hosting provider or use Let's Encrypt. Ensure port 443 is open in your firewall and your web server (Apache/Nginx) is correctly configured for HTTPS.
Security tests
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Form Security