Add security HTTP headers for the domain

Task: I was assigned to enhance the security level of the web application [NDA] by adding and configuring security HTTP headers. The goal was to protect against a wide range of web threats, such as XSS attacks, Clickjacking, MITM, SQL injections, and other vulnerabilities.

The work included:

— Analyzing the current security state of the web application in terms of missing or misconfigured HTTP headers.
— Adding and configuring critical security headers, such as:
—— Content-Security-Policy (CSP): Preventing the execution of malicious scripts and protecting against XSS attacks.
—— Strict-Transport-Security (HSTS): Enforcing the use of HTTPS for all connections, protecting against data interception attacks.
—— X-Frame-Options: Preventing Clickjacking attacks by restricting the ability to embed pages on third-party sites.
—— X-Content-Type-Options: Protecting against MIME type attacks by disabling automatic content type detection.
—— Referrer-Policy: Controlling what information is passed in the Referrer header.
—— Permissions-Policy: Restricting access to browser APIs that could be used for malicious actions.
— Verifying and testing the changes made to ensure compatibility and effectiveness of the added headers.
— Optimizing header settings for maximum security level without negatively impacting the site's performance and functionality.
— Rescanning and retesting the domain to confirm the correctness and effectiveness of the settings.

Result: After implementing the security HTTP headers, the domain became significantly more protected against a wide range of web attacks. Test results showed a reduction in risks and compliance with best security practices for web applications.