A practical guide to implementing Content Security Policy (CSP) to secure Client-side
summary
Step-by-step practical plan: start with a monitoring mode CSP sent as an HTTP header and paired with a report-collection service, use scanner.dom.io to auto-generate a baseline policy in five–ten minutes, then add directives and move sensitive ones (script-src, form-action) into a separate blocking mode policy progressively; use nonces or strict host lists for dynamic scripts, keep image-src in monitoring if it’s highly variable, expect ~1–2 weeks to reach a safe blocking rollout.
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chapters (6)
- 0:00The state of web security
- 2:02Understanding CSP
- 3:42Implementing CSP basics
- 6:31Stage one: Monitoring mode
- 10:24Stage two: Blocking mode
- 14:57Conclusion and resources
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