netcheckx 2.1.0

Network connectivity checker with DNS, ping, HTTP, and SSL validation

Network Connectivity Checker (netcheck)

A premium, cross-platform, production-grade Network Intelligence Engine & CLI written in pure Python 3. Overhauled from a legacy Bash tool into a zero-dependency Python engine with high-concurrency diagnostics, lenient target input normalisation, structured output (JSON/CSV/XML), and an integrated Model Context Protocol (MCP) Server for AI assistants.

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🚀 Key Features

• Zero-Dependency Core — Built on the Python standard library. No third-party packages required to run.
• Cross-Platform — Native support for Linux, macOS, and Windows with consistent terminal output.
• Subcommand CLI — Modular tcp, dns, http, ssl, ping, and interfaces subcommands.
• Structured Output — Every check returns --format text|json|csv|xml.
• MCP Server — Turns netcheck into a local tool-server for Claude, ChatGPT, and other AI agents.
• Lenient Parsing — Accepts CSVs, URLs, bracketed IPv6, IP ranges (192.168.1.1-50), CIDR (10.0.0.0/24), port lists (80,443), and port ranges (8000-8100).
• Concurrent Batch Checks — Configurable thread pools (--jobs, default 10) with real-time progress.
• DNS Caching — Resolves each host once per run; subsequent checks reuse the cached result.
• IPv6 Dual-Stack TCP — Tries all resolved IPs (IPv4 + IPv6) until one connects.
• SSL Inspection Fallback — Uses the cryptography library to inspect certificate metadata even when strict TLS validation fails.

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📦 Installation

Option 1: pip (recommended)

pip install .
# or system-wide:
sudo pip install .

Option 2: Snap Store (Linux)

sudo snap install netcheck
sudo snap connect netcheck:network-observe   # enables ping & interfaces

Option 3: Debian package (.deb)

sudo dpkg -i netcheck_2.0.0_amd64.deb

Option 4: Chocolatey (Windows)

choco install netcheck

Option 5: macOS .pkg

Double-click the downloaded .pkg file, or:

sudo installer -pkg netcheck-2.0.0.pkg -target /

Option 6: Developer / local run (no install)

# 1. Clone the repo
git clone https://github.com/farman20ali/network_access_check.git
cd network_access_check

# 2. Install dev dependencies
pip install -r python-requirements.txt
# or
pip install -e ".[dev]"

# 3. Run directly
python3 -m netcheck --help

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🛠️ CLI Reference

Subcommands

Subcommand	Description	Example
tcp	TCP port reachability	netcheck tcp google.com 80,443
dns	DNS hostname resolution	netcheck dns github.com
http	HTTP/HTTPS status + latency	netcheck http https://google.com
ssl	SSL certificate inspection	netcheck ssl google.com
ping	ICMP ping with RTT stats	netcheck ping 8.8.8.8
interfaces	Active network interfaces + public IP	netcheck interfaces --all

Global Flags

Flag	Default	Description
-t, --timeout	5	Connection timeout in seconds
-j, --jobs	10	Concurrent thread pool size
-f, --format	text	Output format: text, json, csv, xml
--retry	1	Number of connection attempts
--retry-delay	1	Delay between retries (seconds)
-c, --count	4	Ping packet count (ping subcommand only)
-v, --version	—	Print version and exit

Legacy Flags (kept for backward compatibility)

Legacy	Equivalent subcommand
-q, --quick <host> <port>	netcheck tcp
-d, --dns <host>	netcheck dns
-p, --ping <host>	netcheck ping
-s, --status <url>	netcheck http
--cert <host>	netcheck ssl
--my-ip, -ip	netcheck interfaces

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🤖 MCP Server

netcheck ships an integrated Model Context Protocol server.

netcheck --mcp
# or
python3 -m netcheck.mcp.server

Claude Desktop claude_desktop_config.json:

{
  "mcpServers": {
    "netcheck": {
      "command": "python3",
      "args": ["-m", "netcheck.mcp.server"],
      "env": { "PYTHONPATH": "/path/to/network_access_check" }
    }
  }
}

Exposed MCP tools: dns_lookup, ping_host, check_tcp_port, check_http_status, check_ssl_certificate, list_interfaces.

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🏗️ Building Packages

All packaging is orchestrated by build_packages.py. Templates live in packaging/.

packaging/
├── chocolatey/        ← Windows Chocolatey (.nupkg)
│   └── tools/
├── linux/             ← install.sh / uninstall.sh
├── macos/             ← macOS .pkg scripts
├── snap/              ← snapcraft.yaml template
└── windows/           ← NSIS installer script (.nsi)

Common build commands

# Check available tools on this machine
python3 build_packages.py --check

# Sync a new version across all config files
python3 build_packages.py --sync-version 2.1.0

# Build all packages for the current OS
python3 build_packages.py --all

# Individual targets
python3 build_packages.py --pypi      # wheel + sdist
python3 build_packages.py --deb       # Debian .deb
python3 build_packages.py --rpm       # RPM
python3 build_packages.py --snap      # Snap .snap
python3 build_packages.py --linux     # standalone binary (PyInstaller)
python3 build_packages.py --win       # Windows .exe + NSIS + Chocolatey
python3 build_packages.py --mac       # macOS binary + .pkg

All output lands in dist/<target>/.

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🧪 Running Tests

# Using Make
make test

# Using pytest directly
python3 -m pytest tests/ -v

# With coverage
python3 -m pytest tests/ --cov=netcheck --cov-report=term-missing

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📁 Repository Structure

network_access_check/
├── netcheck/                  ← Python package
│   ├── __init__.py            ← version string
│   ├── __main__.py            ← python3 -m netcheck entry point
│   ├── cli.py                 ← CLI argument parsing & dispatch
│   ├── mcp/                   ← MCP server
│   ├── modules/               ← dns, tcp, http, ssl, ping, interfaces
│   └── utils/                 ← formatters, retry, concurrency helpers
├── packaging/                 ← Platform packaging templates
│   ├── chocolatey/
│   ├── linux/
│   ├── macos/
│   ├── snap/
│   └── windows/
├── tests/                     ← pytest test suite
├── docs/                      ← Guides and release notes
├── .github/workflows/         ← CI (ci.yml) + Release (release.yml)
├── build_packages.py          ← Build orchestration script
├── pyproject.toml             ← Package metadata & build config
├── python-requirements.txt    ← Local dev setup shortcut
└── Makefile                   ← make install / test / clean

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🛡️ License

Distributed under the GNU General Public License v3 (GPL-3.0). See LICENSE for details.