vapt-network

vapt-network is a skill for Claude Code, Codex from bhuvangupta/vapt-claude. It costs 0 tokens per session (1,373 once invoked), scanned A, original, MIT.

A network security testing skill that checks a website or server for open network ports, running services, software versions, and possible operating-system details.

In plain words
What is it for?
Use it to scan a permitted target during a vulnerability assessment and identify open ports and the services behind them.
Why use it?
It helps reveal services that are exposed to the internet and may need to be restricted or updated.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to scan a permitted target during a vulnerability assessment and identify open ports and the services behind them.

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

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 vapt-network

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/bhuvangupta/vapt-claude/vapt-network"><img src="https://agentmods.dev/badge/skills/bhuvangupta/vapt-claude/vapt-network.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,373 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00000 $0.01373
Opus 5 $0.00000 $0.00687
Sonnet 5 $0.00000 $0.00275
Haiku 4.5 $0.00000 $0.00137

Measured 8d ago against content hash 82114ca6edc5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

vapt-network scanned grade A with 1 finding 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 8d 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 rootlowPrivilege escalation

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

Note: OS detection requires root/sudo privileges. If not available, infer from service banners and TTL values.

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

skills/vapt-network/SKILL.md · 177 lines

How it starts

The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Network & Port Scanning

When Invoked

The user runs /vapt network <url> or this skill is triggered as part of Wave 2 during /vapt audit.

Phase 1: Port Discovery

1.1 Quick Scan (Top Ports)

If nmap is installed:

nmap -sT -T4 --top-ports 1000 -oN - <target>

If rustscan is installed (fast alternative):

rustscan -a <target> --ulimit 5000 -- -sV

If masscan is installed (fastest for full range):

masscan <target_ip> -p1-65535 --rate=1000

Fallback (Python/netcat):

# Check common ports with netcat
for port in 21 22 23 25 53 80 110 111 135 139 143 443 445 993 995 1433 1521 3306 3389 5432 5900 6379 8080 8443 8888 9090 27017; do
    nc -z -w1 <target> $port 2>/dev/null && echo "Port $port: OPEN"
done

1.2 Service Version Detection

If nmap is installed:

nmap -sV -sC -p <open_ports> <target>

Flags:

  • -sV — Probe open ports for service/version info
  • -sC — Run default NSE scripts

1.3 OS Fingerprinting

nmap -O <target>

Note: OS detection requires root/sudo privileges. If not available, infer from service banners and TTL values.

1.4 NSE Vulnerability Scripts

Run targeted NSE scripts against discovered services:

# General vulnerability check
nmap --script vuln -p <open_ports> <target>

# Service-specific scripts
nmap --script http-vuln* -p 80,443,8080 <target>
nmap --script ssh-auth-methods -p 22 <target>
nmap --script mysql-vuln* -p 3306 <target>
nmap --script smb-vuln* -p 445 <target>

1.5 UDP Scan (Common Services)

nmap -sU --top-ports 20 <target>

Key UDP services to check:

  • 53 (DNS)
  • 67/68 (DHCP)
  • 69 (TFTP)
  • 123 (NTP)
  • 161/162 (SNMP)
  • 500 (IKE/IPSec)
  • 514 (Syslog)

Phase 2: Analysis

2.1 Service Risk Assessment

For each discovered service, assess:

Service Common Risks
FTP (21) Anonymous login, cleartext creds, known CVEs
SSH (22) Weak algorithms, brute force, old versions
Telnet (23) Cleartext protocol — critical if exposed
SMTP (25) Open relay, user enumeration
DNS (53) Zone transfer, cache poisoning
HTTP (80) Unencrypted web traffic
SMB (445) EternalBlue, null sessions, share enumeration
MySQL (3306) Remote access, default creds
PostgreSQL (5432) Remote access, default creds
RDP (3389) Brute force, BlueKeep
Redis (6379) No auth by default, RCE potential
MongoDB (27017) No auth by default, data exposure

Read the full file on GitHub · 177 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. 8d ago First seen · 177 lines · 0 tokens per session scan A 82114ca6edc5

Subscribe to this mod's changes

vapt-network is a skill published in the GitHub repository bhuvangupta/vapt-claude (1 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,373 tokens. A static security scan graded it A with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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