Agent skill

Scanning Network With Nmap Advanced

by mukul975 in mukul975/Anthropic-Cybersecurity-Skills

Performs advanced network recon using Nmap's Scripting Engine (NSE), timing controls, firewall/IDS evasion, and structured output parsing to discover hosts, enumerate service versions, detect…

Apache-2.0Auto-check passedSecurity

Install Scanning Network With Nmap Advanced

skills CLI
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill scanning-network-with-nmap-advanced -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills scanning-network-with-nmap-advanced --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/scanning-network-with-nmap-advanced .claude/skills/scanning-network-with-nmap-advanced && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
scanning-network-with-nmap-advanced
GitHub stars
34k
Token cost
~2.3k tokens
SKILL.md length
621 words
Files
4 (incl. scripts, references)
Skills in repo
644
Repo updated
First seen
Licence
Apache-2.0

At a glance

Performs advanced network recon using Nmap's Scripting Engine (NSE), timing controls, firewall/IDS evasion, and structured output parsing to discover hosts, enumerate service versions, detect…

  • Works in 6 steps: Host Discovery with Multiple Probes → Port Scanning with Timing and… → Service Version Detection and OS… → …
  • Tasks that involve Penetration testing
  • SKILL.md covers When to Use, Prerequisites, Workflow and Key Concepts, plus 3 more sections
  • Runs Python scripts from its folder; calls mysql

What it does

Scanning Network With Nmap Advanced is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Performs advanced network recon using Nmap's Scripting Engine (NSE), timing controls, firewall/IDS evasion, and structured output parsing to discover hosts, enumerate service versions, detect vulnerabilities, and fingerprint OSes. Use during authorized penetration tests or enterprise asset-discovery assessments needing scan evasion, NSE vulnerability checks, or output fed into a vulnerability management pipeline.

Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including scripts and reference files (for example `references/api-reference.md` and `scripts/agent.py`).

It sits in Security, covering Penetration testing, Vulnerability scanning and Structured output and tool calling. It works with Nmap. The repository describes itself as: 817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io…. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Penetration testing
  • Tasks that involve Vulnerability scanning
  • Tasks that involve Structured output and tool calling

Example prompts

  • “Use the scanning-network-with-nmap-advanced skill to perform advanced network recon using Nmap's Scripting Engine (NSE), timing controls…”
  • “/scanning-network-with-nmap-advanced”

Requirements

  • Python 3

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Host Discovery with Multiple Probes
  2. Port Scanning with Timing and Performance Tuning
  3. Service Version Detection and OS Fingerprinting
  4. NSE Vulnerability Scanning
  5. Firewall Evasion Techniques
  6. Output Parsing and Reporting

What it can do on your machine

Read from SKILL.md and the folder at commit 54a7988. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • mysql

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Scanning Network With Nmap Advanced loads about 2.3k tokens when it runs, and up to ~2.8k if it reads all its reference files. Until then it costs about 113 tokens; SKILL.md has 621 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~113
When it runs · the whole SKILL.md, loaded when a task matches
~2.3k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from mukul975/Anthropic-Cybersecurity-Skills at commit 54a7988, republished under its Apache-2.0 licence (© mukul975). 621 words, ~2,303 tokens.

Download SKILL.mdSave it as .claude/skills/scanning-network-with-nmap-advanced/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
scanning-network-with-nmap-advanced
description
Performs advanced network recon using Nmap's Scripting Engine (NSE), timing controls, firewall/IDS evasion, and structured output parsing to discover hosts, enumerate service versions, detect vulnerabilities, and fingerprint OSes. Use during authorized penetration tests or enterprise asset-discovery assessments needing scan evasion, NSE vulnerability checks, or output fed into a vulnerability management pipeline.
domain
cybersecurity
subdomain
network-security
tags
network-security, nmap, port-scanning, service-enumeration, reconnaissance
version
1.0
author
mahipal
license
Apache-2.0
nist_csf
PR.IR-01, DE.CM-01, ID.AM-03, PR.DS-02
mitre_attack
T1046, T1040, T1557, T1071, T1595

Scanning Network with Nmap Advanced Techniques

When to Use

  • Performing comprehensive asset discovery across large enterprise networks during authorized assessments
  • Enumerating service versions and configurations to identify outdated or vulnerable software
  • Bypassing firewall rules and IDS during authorized penetration tests using scan evasion techniques
  • Scripting automated vulnerability checks using the Nmap Scripting Engine (NSE)
  • Generating structured scan output for integration into vulnerability management pipelines

Do not use against networks without explicit written authorization, on production systems during peak hours without approval, or to perform denial-of-service through aggressive scan timing.

Prerequisites

  • Nmap 7.90+ installed (nmap --version to verify)
  • Root/sudo privileges for SYN scans, OS detection, and raw packet techniques
  • Written authorization specifying in-scope IP ranges and any excluded hosts
  • Network access to target ranges (VPN, direct connection, or jump host)
  • Familiarity with TCP/IP protocols and common port assignments

Workflow

Step 1: Host Discovery with Multiple Probes

Use layered discovery to find live hosts even when ICMP is blocked:

bash
# ARP discovery for local subnet (most reliable on LAN)
nmap -sn -PR 192.168.1.0/24 -oA discovery_arp

# Combined ICMP + TCP + UDP probes for remote networks
nmap -sn -PE -PP -PS21,22,25,80,443,445,3389,8080 -PU53,161,500 10.0.0.0/16 -oA discovery_combined

# List scan to resolve DNS names without sending packets to targets
nmap -sL 10.0.0.0/24 -oN dns_resolution.txt

Consolidate results into a live hosts file:

bash
grep "Host:" discovery_combined.gnmap | awk '{print $2}' | sort -t. -k1,1n -k2,2n -k3,3n -k4,4n > live_hosts.txt
Step 2: Port Scanning with Timing and Performance Tuning
bash
# Full TCP SYN scan with optimized timing
nmap -sS -p- --min-rate 5000 --max-retries 2 -T4 -iL live_hosts.txt -oA full_tcp_scan

# Top 1000 UDP ports with version detection
nmap -sU --top-ports 1000 --version-intensity 0 -T4 -iL live_hosts.txt -oA udp_scan

# Specific port ranges for targeted assessment
nmap -sS -p 1-1024,3306,5432,6379,8080-8090,9200,27017 -iL live_hosts.txt -oA targeted_ports
Step 3: Service Version Detection and OS Fingerprinting
bash
# Aggressive service detection with version intensity
nmap -sV --version-intensity 5 -sC -O --osscan-guess -p <open_ports> -iL live_hosts.txt -oA service_enum

# Specific service probing for ambiguous ports
nmap -sV --version-all -p 8443 --script ssl-cert,http-title,http-server-header <target> -oN service_detail.txt
Step 4: NSE Vulnerability Scanning
bash
# Run vulnerability detection scripts
nmap --script vuln -p <open_ports> -iL live_hosts.txt -oA vuln_scan

# Target specific vulnerabilities
nmap --script smb-vuln-ms17-010,smb-vuln-ms08-067 -p 445 -iL live_hosts.txt -oA smb_vulns
nmap --script ssl-heartbleed,ssl-poodle,ssl-ccs-injection -p 443,8443 -iL live_hosts.txt -oA ssl_vulns

# Brute force default credentials on discovered services
nmap --script http-default-accounts,ftp-anon,ssh-auth-methods -p 21,22,80,8080 -iL live_hosts.txt -oA default_creds
Step 5: Firewall Evasion Techniques
bash
# Fragment packets to evade simple packet inspection
nmap -sS -f --mtu 24 -p 80,443 <target> -oN fragmented_scan.txt

# Use decoy addresses to obscure scan origin
nmap -sS -D RND:10 -p 80,443 <target> -oN decoy_scan.txt

# Spoof source port as DNS (53) to bypass poorly configured firewalls
nmap -sS --source-port 53 -p 1-1024 <target> -oN spoofed_port_scan.txt

# Idle scan using a zombie host (completely stealthy)
nmap -sI <zombie_host> -p 80,443,445 <target> -oN idle_scan.txt

# Slow scan to evade IDS rate-based detection
nmap -sS -T1 --max-rate 10 -p 1-1024 <target> -oA stealth_scan
Step 6: Output Parsing and Reporting
bash
# Convert XML output to HTML report
xsltproc full_tcp_scan.xml -o scan_report.html

# Extract open ports per host from grepable output
grep "Ports:" full_tcp_scan.gnmap | awk -F'Ports: ' '{print $1 $2}' > open_ports_summary.txt

# Parse XML with nmap-parse-output for structured data
nmap-parse-output full_tcp_scan.xml hosts-to-port 445

# Import into Metasploit database
msfconsole -q -x "db_import full_tcp_scan.xml; hosts; services; exit"

# Generate CSV for vulnerability management tools
nmap-parse-output full_tcp_scan.xml csv > scan_results.csv

Key Concepts

TermDefinition
SYN Scan (-sS)Half-open TCP scan that sends SYN packets and analyzes responses without completing the three-way handshake, making it faster and stealthier than connect scans
NSE (Nmap Scripting Engine)Lua-based scripting framework built into Nmap that enables vulnerability detection, brute forcing, service discovery, and custom automation
Timing Templates (-T0 to -T5)Predefined scan speed profiles ranging from Paranoid (T0) to Insane (T5), controlling probe parallelism, timeout values, and inter-probe delays
Idle Scan (-sI)Advanced scan technique that uses a zombie host's IP ID sequence to port scan a target without sending packets from the scanner's own IP address
Version IntensityControls how many probes Nmap sends to determine service versions, ranging from 0 (light) to 9 (all probes), trading speed for accuracy
Grepable Output (-oG)Legacy Nmap output format designed for easy parsing with grep, awk, and sed for scripted analysis of scan results
Show full SKILL.md (275 more words)Show less

Tools & Systems

  • Nmap 7.90+: Core scanning engine with NSE scripting, OS detection, version probing, and multiple output formats
  • nmap-parse-output: Community tool for parsing Nmap XML output into structured formats (CSV, JSON, host lists)
  • Ndiff: Nmap utility for comparing two scan results to identify changes in network state over time
  • Zenmap: Official Nmap GUI providing visual network topology mapping and scan profile management
  • Metasploit Framework: Imports Nmap XML output for direct correlation of scan results with exploit modules

Common Scenarios

Scenario: Enterprise Network Asset Discovery and Vulnerability Baseline

Context: A security team needs to establish a vulnerability baseline for a corporate network spanning 10.0.0.0/8 with approximately 5,000 active hosts. Scanning must complete within a weekend maintenance window with minimal network disruption.

Approach:

  1. Run layered host discovery using ARP (local subnets), TCP SYN (ports 22,80,443,445,3389), and ICMP echo probes across all /24 subnets
  2. Perform a full TCP SYN scan on discovered hosts using --min-rate 5000 and -T4 to complete within the window
  3. Run service version detection and default NSE scripts on all open ports
  4. Execute targeted NSE vulnerability scripts for critical services (SMB, SSL/TLS, HTTP)
  5. Parse XML output to generate per-subnet CSV reports and import into the vulnerability management platform
  6. Schedule Ndiff comparisons against future scans to track remediation progress

Pitfalls:

  • Setting --min-rate too high on congested network segments causing packet loss and false negatives
  • Running -T5 (Insane) timing on production networks, potentially overwhelming older network devices
  • Forgetting to scan UDP ports, missing critical services like SNMP (161), DNS (53), and TFTP (69)
  • Not saving output in XML format (-oX or -oA), losing structured data for downstream tool integration

Output Format

## Nmap Scan Summary

**Scan Profile**: Full TCP + Top 200 UDP + Service Enumeration
**Target Range**: 10.10.0.0/16
**Hosts Discovered**: 347 live hosts
**Scan Duration**: 2h 14m

### Critical Findings

| Host | Port | Service | Version | Vulnerability |
|------|------|---------|---------|---------------|
| 10.10.5.23 | 445/tcp | SMB | Windows Server 2012 R2 | MS17-010 (EternalBlue) |
| 10.10.8.100 | 443/tcp | Apache httpd | 2.4.29 | CVE-2021-41773 (Path Traversal) |
| 10.10.12.5 | 3306/tcp | MySQL | 5.6.24 | CVE-2016-6662 (RCE) |
| 10.10.3.77 | 161/udp | SNMP | v2c | Public community string |

### Recommendations
1. Patch MS17-010 on 10.10.5.23 immediately -- Critical RCE vulnerability
2. Upgrade Apache httpd to 2.4.58+ on 10.10.8.100
3. Upgrade MySQL to 8.0.x on 10.10.12.5 and restrict bind address
4. Change SNMP community strings from "public" on 10.10.3.77

© mukul975, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (scripts, references) in skills/scanning-network-with-nmap-advanced of mukul975/Anthropic-Cybersecurity-Skills.

  • SKILL.md
  • LICENSE
  • references/api-reference.md
  • scripts/agent.py

Open the folder on GitHubat commit 54a7988

Compare with similar skills

Scanning Network With Nmap Advanced next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Scanning Network With Nmap Advanced compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
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Network Scannerptn1411/skill219—~1.4kAutomated safety check: NotesNone
Nmap Service Detectionautomateyournetwork/netclaw676—~1.5kAutomated safety check: PassApache-2.0
Code Audit3stoneBrother/code-audit8921 repos~2.7kAutomated safety check: PassNone
Dast Automationhardw00t/ai-security-arsenal105—~2.2kAutomated safety check: PassNone

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Works with

Categories

Questions about Scanning Network With Nmap Advanced

What does Scanning Network With Nmap Advanced do?

Performs advanced network recon using Nmap's Scripting Engine (NSE), timing controls, firewall/IDS evasion, and structured output parsing to discover hosts, enumerate service versions, detect…. Scanning Network With Nmap Advanced is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Performs advanced network recon using Nmap's Scripting Engine (NSE), timing controls, firewall/IDS evasion, and structured output parsing to discover hosts, enumerate service versions, detect vulnerabilities, and fingerprint OSes.

When should I use Scanning Network With Nmap Advanced?

Scanning Network With Nmap Advanced fits situations like: tasks that involve Penetration testing; tasks that involve Vulnerability scanning; tasks that involve Structured output and tool calling.

How do I install Scanning Network With Nmap Advanced in Claude Code?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill scanning-network-with-nmap-advanced -a claude-code`. Or copy the skill folder (skills/scanning-network-with-nmap-advanced in mukul975/Anthropic-Cybersecurity-Skills) into .claude/skills/scanning-network-with-nmap-advanced in your project. Claude Code loads it when a task matches its description.

How do I install Scanning Network With Nmap Advanced in Codex?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill scanning-network-with-nmap-advanced -a codex`. Or copy the skill folder (skills/scanning-network-with-nmap-advanced in mukul975/Anthropic-Cybersecurity-Skills) into .agents/skills/scanning-network-with-nmap-advanced in your project. Codex loads it when a task matches its description.

Can I use Scanning Network With Nmap Advanced in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill scanning-network-with-nmap-advanced -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/scanning-network-with-nmap-advanced, .gemini/skills/scanning-network-with-nmap-advanced, .github/skills/scanning-network-with-nmap-advanced and .opencode/skills/scanning-network-with-nmap-advanced in your project.

What does Scanning Network With Nmap Advanced need to run?

Going by SKILL.md and its folder, Scanning Network With Nmap Advanced needs Python for the scripts in its folder and the command-line tools its instructions call (mysql). Our summary lists: Python 3.

Does Scanning Network With Nmap Advanced access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Scanning Network With Nmap Advanced safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Scanning Network With Nmap Advanced use?

Scanning Network With Nmap Advanced is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Scanning Network With Nmap Advanced use?

About 2.3k tokens (SKILL.md is roughly 9.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 519 tokens, read only when the agent opens those files.

What are the alternatives to Scanning Network With Nmap Advanced?

Skills that share tags, products or a category with Scanning Network With Nmap Advanced: Nmap (BrownFineSecurity/iothackbot, 859 stars), Network Scanner (ptn1411/skill, 219 stars), Nmap Service Detection (automateyournetwork/netclaw, 676 stars) and Code Audit (3stoneBrother/code-audit, 892 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Scanning Network With Nmap Advanced?

mukul975 (a GitHub user) maintains it in mukul975/Anthropic-Cybersecurity-Skills, which has 34,116 GitHub stars. The repository holds 644 skills in this directory. The repository was last updated on August 31, 2026.

Source: mukul975/Anthropic-Cybersecurity-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.