Network Reconnaissance

Network Reconnaissance is a skill for Claude Code from allsmog/blackbox-claude-plugin. It costs 51 tokens per session (1,142 once invoked), scanned B, original, MIT.

A guide to network reconnaissance, the process of finding reachable hosts, open ports, running services, and possible attack paths. It focuses on tools and techniques such as Nmap scans, service detection, and script-based checks.

In plain words
What is it for?
Use it for authorised host discovery, port scanning, service and version detection, UDP checks, banner gathering, and Nmap script-based reconnaissance.
Why use it?
It helps developers and security testers understand what is exposed on a network and which services may need attention. It also explains different scan depths and discovery methods.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the blackbox-htb plugin — 17 skills, 11 commands, 9 agents shipped together

Good fit Use it for authorised host discovery, port scanning, service and version detection, UDP checks, banner gathering, and Nmap script-based reconnaissance.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/allsmog/blackbox-claude-plugin/reconnaissance
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 allsmog/blackbox-claude-plugin --skill reconnaissance
Clone the repo
git clone --depth 1 https://github.com/allsmog/blackbox-claude-plugin

Made for: Claude Code.

Or install blackbox-htb, the plugin that ships this one along with the rest of its 17 skills, 11 commands, 9 agents.

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 Network Reconnaissance

README.md
[![agentmods](https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/reconnaissance/github.svg)](https://agentmods.dev/skills/allsmog/blackbox-claude-plugin/reconnaissance)
Your own site
<a href="https://agentmods.dev/skills/allsmog/blackbox-claude-plugin/reconnaissance"><img src="https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/reconnaissance/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.

agentmods 80×15 button for Network Reconnaissance

Your own site · 80×15
<a href="https://agentmods.dev/skills/allsmog/blackbox-claude-plugin/reconnaissance"><img src="https://agentmods.dev/badge/skills/allsmog/blackbox-claude-plugin/reconnaissance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,142 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00051 $0.01142
Opus 5 $0.00026 $0.00571
Sonnet 5 $0.00010 $0.00228
Haiku 4.5 $0.00005 $0.00114

Measured 9d ago against content hash 3bcf52fe1724, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

Network Reconnaissance scanned grade B with 2 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 9d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo nmap -sU --top-ports 20 <TARGET>

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -I http://<TARGET>
blackbox-htb/skills/reconnaissance/SKILL.md · 194 lines

How it starts

The opening of the file, as written. The whole thing — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Network Reconnaissance Skill

Overview

Comprehensive network reconnaissance techniques for identifying open ports, running services, and potential attack vectors on target systems.

Port Scanning with Nmap

Quick Discovery Scans

# Top 1000 ports with version detection
nmap -sC -sV -T4 <TARGET>

# Fast scan top 100 ports
nmap -F <TARGET>

# Ping sweep for network
nmap -sn 10.10.10.0/24

Comprehensive Scans

# All TCP ports
nmap -p- -T4 --min-rate=1000 <TARGET>

# All TCP with version detection (slower but thorough)
nmap -p- -sC -sV <TARGET>

# UDP top 20 ports (requires root)
sudo nmap -sU --top-ports 20 <TARGET>

Stealth Options

# SYN scan (default, requires root)
sudo nmap -sS <TARGET>

# Connect scan (no root required)
nmap -sT <TARGET>

# Slow scan to evade IDS
nmap -T2 --scan-delay 1s <TARGET>

Nmap Script Engine (NSE)

Categories

# Vulnerability detection
nmap --script vuln <TARGET>

# Safe scripts (won't crash services)
nmap --script safe <TARGET>

# Default scripts (-sC equivalent)
nmap --script default <TARGET>

# Discovery scripts
nmap --script discovery <TARGET>

Service-Specific Scripts

# HTTP enumeration
nmap --script http-enum -p80,443 <TARGET>

# SMB enumeration
nmap --script smb-enum* -p445 <TARGET>

# SMB vulnerabilities
nmap --script smb-vuln* -p445 <TARGET>

# FTP checks
nmap --script ftp-anon,ftp-bounce -p21 <TARGET>

# SSH enumeration
nmap --script ssh-* -p22 <TARGET>

Alternative Tools

Masscan (Faster than Nmap)

# Scan all ports quickly
masscan -p1-65535 <TARGET> --rate=1000

# Top ports
masscan -p80,443,22,21,25,3389 <TARGET> --rate=1000

Rustscan (Fastest)

# Quick scan, pipe to nmap
rustscan -a <TARGET> -- -sC -sV

Service Identification

Banner Grabbing

# Netcat
nc -nv <TARGET> <PORT>

# Telnet
telnet <TARGET> <PORT>

# Curl for HTTP
curl -I http://<TARGET>

Version Detection

# Aggressive version detection
nmap -sV --version-intensity 5 -p<PORT> <TARGET>

Read the full file on GitHub · 194 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. 9d ago First seen · 194 lines · 51 tokens per session scan B 3bcf52fe1724

Subscribe to this mod's changes

Network Reconnaissance is a skill published in the GitHub repository allsmog/blackbox-claude-plugin (5 stars, last pushed 6mo ago), licensed MIT. It adds 51 tokens to every session and 1,142 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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