Date: December 4, 2019 1 Minute to Read
Adding HSTS (HTTP Strict Transport Security) in Drupal 8 forces web browsers to only load your website with a valid SSL certificate. This improves Drupal security against downgrade attacks and similar man-in-the-middle (MITM) attacks. HSTS is similar to a HTTP to HTTPS redirect but within the browser.
Install Security Kit
- Login to Drupal.
- Install the Drupal module using the Security Kit download link.
- Click Install at the bottom.
- Click Configuration at the top.
- Under System, Click Security Kit settings.
- Click SSL/TLS to see HSTS settings.
- Check the box for HTTP Strict Transport Security.
- Specify the Max-age (in seconds) for how long the header should remain active.
- (Optional) Check the box to Include Subdomains for this domain.
- (Optional) Check Preload if you plan to submit your domain to the HSTS preload list after saving these changes.
- At the bottom, click Save configuration.
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