nsg-audit

nsg-audit is a skill for Claude Code, Codex from microsoft/sre-agent. It costs 100 tokens per session (1,359 once invoked), scanned A, original, MIT.

A read-only procedure for auditing Azure Network Security Groups and the network paths in the Zava Learning resource group. An NSG is a firewall-like set of rules controlling traffic to cloud resources.

In plain words
What is it for?
Use it during scheduled network-security reviews to inspect NSGs, routing tables, private connections, DNS, and firewalls, then report findings.
Why use it?
It helps find exposed management ports, overly broad rules, unused security groups, and broken or unsafe routes without changing the environment.

Skill for Claude CodeCodex

About the project

microsoft/sre-agent is the community repository for Azure SRE Agent, an AI assistant for diagnosing and resolving production problems and reducing routine operations work. It is for teams working on service reliability and includes documentation, discussions, videos, and hands-on labs for using the product. The catalogue skills relate to the agent's official plugins and resources.

microsoft/sre-agent · 151 stars · on GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/microsoft/sre-agent/nsg-audit
Any agent
npx skills add microsoft/sre-agent --skill nsg-audit
Clone the repo
git clone --depth 1 https://github.com/microsoft/sre-agent

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for nsg-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/microsoft/sre-agent/nsg-audit.svg)](https://agentmods.dev/skills/microsoft/sre-agent/nsg-audit)
Your own site
<a href="https://agentmods.dev/skills/microsoft/sre-agent/nsg-audit"><img src="https://agentmods.dev/badge/skills/microsoft/sre-agent/nsg-audit.svg" alt="Measured on agentmods" height="20"></a>
Per session 100 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,359 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00100 $0.01359
Opus 5 $0.00050 $0.00679
Sonnet 5 $0.00020 $0.00272
Haiku 4.5 $0.00010 $0.00136

Measured 5d ago against content hash a500dccce5c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

nsg-audit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

labs/zava-learning/sre-config/agent-config/skills/nsg-audit/SKILL.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Zava Learning — Network Security Group (NSG) & Connectivity-Path Audit

Resource Group: @@RG@@. Read-only audit — never create, modify, or delete an NSG, rule, route, or firewall. This is a weekly posture review of the lab's network exposure and the integrity of its connectivity paths, not an incident response.

1. Enumerate the network surface

  • List every NSG: az network nsg list -g @@RG@@.
  • For each NSG, list its security rules (custom + default): az network nsg rule list -g @@RG@@ --nsg-name <nsg> --include-default.
  • Map each NSG to what it protects (az network nsg show -g @@RG@@ -n <nsg> --query "{subnets:subnets[].id, nics:networkInterfaces[].id}"). An NSG attached to no subnet and no NIC is orphaned — itself a finding.

2. Evaluate every inbound (and risky outbound) rule

Flag, with an impact-based severity (see the zava-audit-report severity model):

  • SEV1 — any inbound Allow from * / Internet / 0.0.0.0/0 to a management port (22 SSH, 3389 RDP); a blanket Allow *:* * (any source, any port, any protocol); or a rule whose description marks it temporary / break-glass ("temp", "troubleshooting", "INC-####") that is still present.
  • SEV2 — inbound Allow from a broad source (large CIDR / Internet) to a data or admin port (e.g. 5432 Postgres, 6379 Redis, 1433, 27017, 8080-808x app-management ports) where the source should be a known subnet / Application Gateway only.
  • SEV3shadowed rules (a higher-priority rule fully masks a lower one so it can never match), unused / legacy rules (deny or allow referencing a decommissioned CIDR/subnet), overlapping / duplicate rules, priority inversions, and orphaned NSGs (attached to nothing). Distinguish the lab's intended exposure (the Application Gateway public lane ports 8081-8087 reaching the lane apps; the AppGw subnet allowing Internet inbound on 80/443 + those lane ports) from genuinely risky exposure — flag only what a real reviewer would. The lane data ports (Postgres, the reporting-VM subnet) should be reachable only from inside the VNet; the reporting VM has no public path and needs no inbound Internet at all.

Read the full file on GitHub · 78 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 78 lines · 100 tokens per session scan A a500dccce5c0

Subscribe to this mod's changes

nsg-audit is a skill published in the GitHub repository microsoft/sre-agent (151 stars, last pushed 2d ago), licensed MIT. It adds 100 tokens to every session and 1,359 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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