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Technical Note WAF Rule Writing Guide

References

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Table of Contents
  • Introduction
  • ModSecurity Rule Writing
    • Variables
    • Operator
    • Transformation Functions
    • Actions
    • Rule Syntax
      • Rule Example 1 – Cross Site Scripting (XSS) Attack
      • Rule Example 2 – Allow-list an IP Address
      • Rule Example 3 – Chaining Rules
      • Rule Example 4 – Shellshock Bash Attack
    • WUI Settings
    • Rule Block Function
  • Managing Custom WAF Rules in the LoadMaster
    • Add a Custom Rule
    • Delete/Download a Custom Rule or Data File
  • Assigning Custom Rules to a Virtual Service
    • WAF Misconfigured State
  • Backing Up and Restoring WAF Configuration
  • References
Table of Contents

References

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  • Last Updated: May 13, 2025
  • 1 minute read
    • LoadMaster
    • LoadMaster GA
    • Documentation

Other useful documents are as follows:

ModSecurity Reference Manual

Web Application Firewall Feature Description

LoadMaster Product Overview

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