Helmet
Help secure Express apps with various HTTP headers
Overview
Helmet is a tool that helps secure Express apps by setting HTTP response headers. These headers can help mitigate various types of attacks such as cross-site scripting and clickjacking. By default, Helmet sets a range of headers to enhance the security of web applications.
Features
- Content-Security-Policy: Mitigates attacks like cross-site scripting by creating an allow-list for page activities.
- Cross-Origin-Opener-Policy: Helps to isolate processes on a web page.
- Cross-Origin-Resource-Policy: Blocks others from loading resources cross-originally.
- Referrer-Policy: Allows control over the Referer header in requests.
- Strict-Transport-Security: Encourages browsers to prefer secure HTTPS connections.
- X-Frame-Options: Mitigates clickjacking attacks by controlling how your site can be embedded in frames.
- XSS-Protection: Attempts to mitigate cross-site scripting attacks, though Helmet may disable this for better security.
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