How to Add Security Headers in WordPress

There are several ways to add security headers in a WordPress website:

Use a plugin:

There are several WordPress plugins available that can add security headers to your website, such as All In One WP Security and Firewall, WP Fail2Ban, and iThemes Security.

Use a Content Delivery Network (CDN):

Many CDN providers, such as Cloudflare, automatically add security headers to your website when you use their service.

Manually add headers to your .htaccess file:

You can manually add security headers to your website by editing the .htaccess file in the root of your WordPress installation. You can add headers like the following:

<ifModule mod_headers.c>
Header set X-XSS-Protection "1; mode=block"
Header set X-Content-Type-Options "nosniff"
Header set X-Frame-Options "SAMEORIGIN"
Header set Referrer-Policy "same-origin"
</ifModule>

Use a security service:

There are a number of security services available which can add security headers to your website.

It is important to note that adding security headers is just one aspect of website security, and you should also take other measures such as using a strong password, keeping your website updated, and using a web application firewall.