Skill Market

implementing web application logging with modsecurity

'Configure ModSecurity WAF with OWASP Core Rule Set (CRS) for web application logging, tune rules to reduce false

GitHub
githubcommunityai-agentsclaude-codecloud-securitycybersecuritydevsecopsethical-hacking
0.0
0 installs33.4K GitHub starsby mukul975

Skill Introduction

Overview
'Configure ModSecurity WAF with OWASP Core Rule Set (CRS) for web application logging, tune rules to reduce false

Core value

Turns reusable Debugging know-how into an installable skill, helping users complete github, community, ai-agents, claude-code work faster.

Target users

  • Developers, testers, and maintainers who handle Debugging tasks in Focus Code.
  • Teams that already trust workflows or content from mukul975.
  • Users who want standardized prompts, steps, or conventions instead of repeating setup work.

Best practices

  • Read the skill content first to confirm required inputs, expected outputs, and dependencies.
  • Try it on a small task before relying on it for critical work.
  • Add project-specific constraints such as coding style, target platform, test expectations, and delivery format.
  • For external sources, verify the source link, version, and recent maintenance activity.

Best use cases

  • Tasks related to github, community, ai-agents, claude-code that need a reusable execution flow.
  • Converting a community repo, team convention, or personal workflow into day-to-day assistance.
  • Starting from a proven skill instead of writing prompts or procedures from scratch.

Limits and boundaries

  • Results depend on the quality of the original skill content and may need human correction.
  • It does not replace code review, tests, security review, or professional judgment.
  • External tools, APIs, account permissions, and local dependencies still need separate setup.

Differentiation

  • Structured around Debugging, making it easier to discover and reuse than loose prompt snippets.
  • Marked as GitHub, which helps users judge trust and maintenance expectations.
  • Keeps the original source link available for repository, documentation, or discussion follow-up.
  • Tagged with github, community, ai-agents, claude-code, so it can be filtered by concrete task intent.

Install and use

Install
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focus install implementing-web-application-logging-with-modsecurity-ac0ce5
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Detail Preview

SKILL.md

Primary filemarkdown3 KB

name: implementing-web-application-logging-with-modsecurity description: 'Configure ModSecurity WAF with OWASP Core Rule Set (CRS) for web application logging, tune rules to reduce false positives, analyze audit logs for attack detection, and implement custom SecRules for application-specific threats. The analyst configures SecRuleEngine, SecAuditEngine, and CRS paranoia levels to balance security coverage with operational stability. Activates for requests involving WAF configuration, ModSecurity rule tuning, web application audit logging, or CRS deployment.

' domain: cybersecurity subdomain: web-application-security tags:

  • modsecurity
  • waf
  • crs
  • owasp
  • web-security
  • audit-logging
  • rule-tuning version: '1.0' author: mahipal license: Apache-2.0 nist_ai_rmf:
  • MEASURE-2.7
  • MAP-5.1
  • MANAGE-2.4 atlas_techniques:
  • AML.T0070
  • AML.T0066
  • AML.T0082 nist_csf:
  • PR.PS-01
  • ID.RA-01
  • PR.DS-10
  • DE.CM-01

Implementing Web Application Logging with ModSecurity

Overview

ModSecurity is an open-source WAF engine that works with Apache, Nginx, and IIS. The OWASP Core Rule Set (CRS) provides generic attack detection rules covering SQL injection, XSS, RCE, LFI, and other OWASP Top 10 attacks. ModSecurity logs full request/response data in audit logs for forensic analysis and generates alerts that feed into SIEM platforms.

When to Use

  • When deploying or configuring implementing web application logging with modsecurity capabilities in your environment
  • When establishing security controls aligned to compliance requirements
  • When building or improving security architecture for this domain
  • When conducting security assessments that require this implementation

Prerequisites

  • Web server (Apache 2.4+ or Nginx) with ModSecurity v3 module
  • OWASP CRS v4.x installed
  • Log aggregation infrastructure (ELK, Splunk, or Wazuh)

Steps

  1. Install ModSecurity and configure SecRuleEngine in DetectionOnly mode
  2. Deploy OWASP CRS v4 and set paranoia level (PL1-PL4)
  3. Configure SecAuditEngine for relevant-only logging
  4. Tune false positives with SecRuleRemoveById and rule exclusions
  5. Switch to blocking mode (SecRuleEngine On) after tuning period
  6. Forward audit logs to SIEM for correlation and alerting

Expected Output

ModSecurity: Warning. Pattern match "(?:union\s+select)" [file "/etc/modsecurity/crs/rules/REQUEST-942-APPLICATION-ATTACK-SQLI.conf"] [line "45"] [id "942100"] [msg "SQL Injection Attack Detected via libinjection"] [severity "CRITICAL"]

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