HTTP Headers

Headers are special instructions sent to your browser, these can affect security and how your web browser handles the HTTP response.

Among the most common:

Content-Security-Policy: It can be cumbersome to set up and maintain, but it is one of the mo…


This content originally appeared on DEV Community and was authored by Jacopo Valanzano

Headers are special instructions sent to your browser, these can affect security and how your web browser handles the HTTP response.

Among the most common:

  • Content-Security-Policy: It can be cumbersome to set up and maintain, but it is one of the most effective mitigation techniques against XSS vulnerabilities.

  • X-Frame-Options: Allow iframes from external sources

  • X-Content-Type-Options: whether to allow MIME sniffing when the Content-Type header is not set or its value seems inappropriate

  • Referrer-Policy: Can be used to prevent visitor data from being shared with third parties, such as CDNs

  • Permissions-Policy: Allows access to device sensors and more

  • HSTS: although a bit risky, it can guarantee secure connections

Score your website headers: https://securityheaders.com


This content originally appeared on DEV Community and was authored by Jacopo Valanzano


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