Why are security headers important?

They provide a critical layer of defense-in-depth against common browser-based attacks such as Cross-Site Scripting (XSS), clickjacking, and data injection.

What headers does this skill help configure?

The skill focuses on essential security headers including HSTS, Content Security Policy (CSP), X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.

Can I use this for Nginx server configuration?

Absolutely. The skill provides direct add_header snippets designed for Nginx configuration files.

How do I verify if my headers are set correctly?

The skill points you toward top verification tools like Security Headers, Mozilla Observatory, and Google's CSP Evaluator.

Does this skill support Express.js applications?

Yes, it includes specific implementation patterns using the Helmet middleware library for Express.

Security Headers Configuration

Name: Security Headers Configuration
Author: secondsky

bysecondsky

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Security & Testing

Configures robust HTTP security headers to protect web applications against common browser-based attacks like XSS, clickjacking, and MIME sniffing.

About

This skill provides production-ready implementation patterns and configurations for essential HTTP security headers across multiple environments, including Express.js, Nginx, and Python Flask. It streamlines the process of hardening web applications by offering standardized templates for Content Security Policy (CSP), HTTP Strict Transport Security (HSTS), and other critical security directives. Whether you are preparing for a security audit or deploying a new production service, this skill ensures your headers are configured according to industry best practices and compatible with verification tools like Mozilla Observatory and SecurityHeaders.com.

Key Features

Implementation of HSTS to enforce persistent HTTPS connections
Detailed security checklist for auditing and verification preparation
Standardized protection against clickjacking and MIME-type sniffing
Pre-configured Content Security Policy (CSP) directives for resource restriction
Multi-platform support for Express (Helmet), Nginx, and Flask environments
21 GitHub stars

Use Cases

Hardening production web applications to pass security audits and compliance checks
Mitigating Cross-Site Scripting (XSS) risks through granular CSP implementation
Configuring secure Nginx or Express environments to achieve high security ratings

About

Key Features

Implementation of HSTS to enforce persistent HTTPS connections
Detailed security checklist for auditing and verification preparation
Standardized protection against clickjacking and MIME-type sniffing
Pre-configured Content Security Policy (CSP) directives for resource restriction
Multi-platform support for Express (Helmet), Nginx, and Flask environments
21 GitHub stars

Use Cases

Hardening production web applications to pass security audits and compliance checks
Mitigating Cross-Site Scripting (XSS) risks through granular CSP implementation
Configuring secure Nginx or Express environments to achieve high security ratings