Add these security headers to your website

The X-Frame-Options, Strict-Transport-Security, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and Content-Security-Policy headers are security-related HTTP headers that help enhance the security of web applications. To add these security headers to your website, you can use the .htaccess file for Apache web servers or the server configuration for other web servers. Here's how to set each header:

1. X-Frame-Options:

The X-Frame-Options header helps prevent clickjacking attacks by controlling whether your website can be embedded in an iframe on another domain.

For Apache (using .htaccess):

Header always set X-Frame-Options "SAMEORIGIN"

1. Strict-Transport-Security (HSTS):

The Strict-Transport-Security header enforces the use of HTTPS by instructing the browser to only access the website over a secure (HTTPS) connection.

For Apache (using .htaccess):

Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains"

1. X-Content-Type-Options:

The X-Content-Type-Options header prevents browsers from interpreting files as something other than their declared MIME type, reducing the risk of MIME type sniffing attacks.

For Apache (using .htaccess):

Header always set X-Content-Type-Options "nosniff"

1. Referrer-Policy:

The Referrer-Policy header controls what information is included in the Referer header when navigating away from your site.

For Apache (using .htaccess):

Header always set Referrer-Policy "strict-origin-when-cross-origin"

1. Permissions-Policy:

The Permissions-Policy header allows you to control which features and APIs are allowed on your site.

For Apache (using .htaccess):

Header always set Permissions-Policy "geolocation=(self), microphone=()"

1. Content-Security-Policy:

The Content-Security-Policy (CSP) header restricts the sources from which various types of content can be loaded, helping prevent XSS attacks and other content-related security issues.

For Apache (using .htaccess):

Header always set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self';"

Remember to test your website thoroughly after implementing these headers to ensure they don't interfere with your site's functionality. Each website has unique requirements, so you may need to customize the headers based on your specific use case. Additionally, consider other security headers like Feature-Policy and Expect-CT for further protection.