Network Security Group Auditor

Updated May 13, 2026

What this skill does

Audits AWS Security Groups, NACLs, and firewall rules for overly permissive configurations. Identifies rules allowing unrestricted ingress (0.0.0.0/0), unnecessary open ports, unused security groups, and public-facing resources that should be private. Generates a prioritized remediation report with specific rule changes.

Example

PROMPT

We need to audit our security groups across 3 AWS accounts with 45 VPCs. Focus on: public-facing rules (0.0.0.0/0), overly broad ports (e.g., 22, 3389 wide open), unused security groups, and resources attached to overly permissive SGs.

OUTPUT

Network Security Group Audit — 3 Accounts, 45 VPCs FINDINGS SUMMARY | Finding Type | Count | |---------------------------|-------| | Rules with 0.0.0.0/0 | 23 | | Overly broad ports (22,3389)| 18 | | Unused security groups | 41 | | Resources with public SG | 156 | | NACLs with 0.0.0.0/0 | 7 | CRITICAL: 23 ingress rules allow 0.0.0.0/0 - sg-abc123: port 22, 443 (web tier — review 443, restrict 22) - sg-def456: port 3389 (app tier — restrict to jump host) - sg-ghi789: port 5432 (DB — CRITICAL: restrict immediately) UNUSED GROUPS: 41 security groups with zero attachments Top 5 by age: sg-old1 (340d), sg-old2 (301d), sg-old3 (287d)...

Required Tools

AWS

Compatible Agents

Claude

Cursor

Windsurf

ChatGPT

GitHub Copilot

Any MCP-compatible agent

Add to your agent

Download Skill

Or install via CLI:
$ npx skills add webrix-ai/agent-skills --skill network-security-group-auditor

Deploy Org-wide

Provision to teams via RBAC

Identity-aware execution

Signed & verified skills

Full audit trail

Auto-bundled with required MCP servers

Use with

Free for up to 5 users

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