A procedure for checking the security of a remote server. It can inspect open ports, certificates, firewalls, listening services, network settings, and compliance with CIS security benchmarks.

Use it for vulnerability checks, certificate-expiry reviews, open-port scans, firewall reviews, or CIS Benchmark assessments.

It organizes common server security checks into scopes, from a quick overview to network and compliance reviews. This helps reveal exposed services, certificate problems, and configuration risks.

ssh-audit — Skill for Claude Code by muchiny/bridge-mcp

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.

Any agent

npx skills add muchiny/bridge-mcp --skill ssh-audit

Clone the repo

git clone --depth 1 https://github.com/muchiny/bridge-mcp

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/muchiny/bridge-mcp/ssh-audit/github.svg)](https://agentmods.dev/skills/muchiny/bridge-mcp/ssh-audit)

Your own site

<a href="https://agentmods.dev/skills/muchiny/bridge-mcp/ssh-audit"><img src="https://agentmods.dev/badge/skills/muchiny/bridge-mcp/ssh-audit/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/muchiny/bridge-mcp/ssh-audit"><img src="https://agentmods.dev/badge/skills/muchiny/bridge-mcp/ssh-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 740 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00054	$0.00740
Opus 5.5	$0.00022	$0.00296
Sonnet 5.5	$0.00011	$0.00148
Haiku 4.5	$0.00005	$0.00074

Measured 1mo ago against content hash 2895f6a77d4a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ssh-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 1mo 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.

contrib/claude-skills/ssh-audit/SKILL.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Audit

Run security audits on a remote server via bridge-mcp CLI.

Delegation: Use a general-purpose agent (via the Agent tool) to run these commands in isolation, so verbose scan output does not pollute the main conversation.

Parse $ARGUMENTS: first word = host, second word (optional) = scope (default: quick).

Scope: quick (~2 min)

Fast security overview — run this first:

# Open ports
bridge-mcp tool ssh_port_scan host=HOST --json

# Certificate expiry
bridge-mcp tool ssh_cert_expiry host=HOST --json

# Fail2ban status
bridge-mcp tool ssh_fail2ban_status host=HOST --json

# Firewall rules
bridge-mcp tool ssh_firewall_list host=HOST --json

# Listening services
bridge-mcp tool ssh_exec host=HOST command="ss -tlnp" --json

Scope: network

Network-focused security assessment:

# SSL/TLS audit
bridge-mcp tool ssh_ssl_audit host=HOST --json

# Port scan
bridge-mcp tool ssh_port_scan host=HOST --json

# Active connections
bridge-mcp tool ssh_net_connections host=HOST --json

# DNS configuration
bridge-mcp tool ssh_net_dns host=HOST --json

Scope: compliance

Standards-based compliance check:

# CIS Benchmark
bridge-mcp tool ssh_cis_benchmark host=HOST --json

# STIG check
bridge-mcp tool ssh_stig_check host=HOST --json

# Compliance score
bridge-mcp tool ssh_compliance_score host=HOST --json

# Full compliance report
bridge-mcp tool ssh_compliance_report host=HOST --json

Scope: full

Comprehensive audit — combines all scopes plus vulnerability scanning:

Run all commands from quick, network, and compliance scopes, then add:

# SBOM generation
bridge-mcp tool ssh_sbom_generate host=HOST --json

# Vulnerability scan
bridge-mcp tool ssh_vuln_scan host=HOST --json

# SELinux / AppArmor status
bridge-mcp tool ssh_selinux_status host=HOST --json
bridge-mcp tool ssh_apparmor_status host=HOST --json

# Security audit log
bridge-mcp tool ssh_security_audit host=HOST --json

# User accounts review
bridge-mcp tool ssh_user_list host=HOST --json

Read the full file on GitHub · 110 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.

1mo ago First seen · 110 lines · 54 tokens per session scan A 2895f6a77d4a

Subscribe to this mod's changes

ssh-audit is a skill published in the GitHub repository muchiny/bridge-mcp (10 stars, last pushed today), licensed MIT. It adds 54 tokens to every session and 740 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-31.

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