firewall-review

Audits firewall rule bases for CIS/NIST security-control gaps and remediation recommendations.

44|128|Updated Mar 6, 2026
One-click install
npx skills add https://github.com/UnitOneAI/SecuritySkills --skill firewall-review-unitoneai
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: firewall-review
Source: https://github.com/UnitOneAI/SecuritySkills/tree/main/skills/network/firewall-review
Command: npx skills add https://github.com/UnitOneAI/SecuritySkills --skill firewall-review-unitoneai

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It prevents security reviews from becoming inconsistent by producing a structured, framework-referenced audit of firewall rule bases so you can quickly find risky misconfigurations, weak defaults, and missing visibility.

Core Features & Use Cases

  • CIS v8 + NIST SP 800-41 aligned auditing: Evaluates server and endpoint firewall policy expectations using CIS Controls v8 (4.4, 4.5) and NIST SP 800-41 Rev 1 guidance.
  • Prioritized, evidence-based findings: Classifies issues by severity (Critical/High/Medium/Low) and ties each finding to specific control references and rule evidence.
  • Targets common firewall failure modes: Detects default-deny violations, overly permissive any/any rules, shadowed/unused rules, logging gaps, and insufficient egress filtering.

Quick Start

Run a firewall policy review by loading the skill and targeting your firewall configuration directory with an argument like “skills/network/firewall-review/SKILL.md /path/to/firewall-configs”.

Frequently Asked Questions about firewall-review

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I audit firewall rules against CIS Controls and NIST SP 800-41?

Audit firewall rules against CIS Controls v8 (4.4, 4.5) and NIST SP 800-41 Rev 1 by loading the skill and targeting your configuration directory. It evaluates inbound and outbound enforcement, identifying security-control gaps with prioritized, evidence-based findings.

What is firewall rule shadowing and how do I detect it during a security review?

Firewall rule shadowing occurs when a preceding rule blocks or allows traffic that a subsequent rule intended to handle. Detect shadowing, unused rules, and default-deny violations through ordered rule evaluation to ensure your network security policy functions as intended.

How do I check firewall configurations for missing egress filtering and logging gaps?

Check firewall configurations for insufficient egress filtering and logging gaps by performing a structured audit. The process verifies logging-gap compliance and identifies overly permissive any/any rules to ensure outbound network traffic enforcement meets security standards.

Can I use this firewall audit process for cloud-native network security policies?

Yes, you can audit firewall configurations, ACLs, and network security policies for both traditional and cloud-native platforms. The structured review targets firewall rule bases across diverse environments to find risky misconfigurations and weak defaults.

What's the best way to prioritize firewall misconfigurations found during a rule audit?

Prioritize firewall misconfigurations by classifying issues by severity (Critical, High, Medium, Low) and tying each finding to specific control references and rule evidence. This generates a prioritized remediation report with traceable evidence.

Why does my firewall review fail to identify overly permissive any/any rules?

A firewall review fails to identify overly permissive any/any rules when it lacks deterministic discovery of config files and ordered rule evaluation. Applying a structured audit framework ensures permissiveness checks and default-deny verification catch weak configurations.