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waf-pro

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Deploy and operate web application firewalls — policy tuning, bot management, and virtual patching done right.

skills/waf-pro/SKILL.md

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## Overview

A WAF sits in front of web applications filtering malicious HTTP traffic: injection attempts, protocol abuse, and automated attacks. It is a valuable compensating control — especially for virtual patching when code fixes take time — but it is not a substitute for secure code. Professional WAF practice is tuning: a well-tuned WAF blocks real attacks with minimal false positives; a default WAF mostly generates tickets.

This skill covers WAF deployment modes, rule tuning, bot management, and the honest accounting of what a WAF can and cannot do.

A WAF is a compensating control with an expiration date on every rule — it buys time for real fixes and filters the internet's background radiation of automated attacks. Respect both halves of that: it genuinely reduces noise and buys patching windows, and it genuinely cannot fix your application's broken authorization. Report its value honestly and retire its rules deliberately.

## When to use

- Protecting internet-facing web apps and APIs, especially legacy apps that are hard to patch.
- Virtual patching: blocking exploitation of a known vulnerability while the code fix is developed.
- Reducing automated abuse: credential stuffing, scraping, vulnerability scanning.
- Meeting compliance expectations for application-layer protection.
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