Network Scanner CLI Tool

A high-speed command-line network and port scanner with CIDR support, CSV/JSON export, colorful output, and concurrency.

Features

• Scan single IPs, entire networks (CIDR), or a file of targets (one per line)
• Domain-aware scanning: resolve domains (A/AAAA) and scan the resulting IPs
• DNS record enumeration (A, AAAA, MX, NS, TXT) via --dns
• Subdomain discovery from a wordlist and scanning of discovered hosts via --subdomains and --sub-limit
• Banner grabbing for open ports (--banner) and TLS certificate retrieval (--tls)
• Specify ports with ranges (e.g. 20-80), comma lists, auto presets, or a file of ports
• CSV and JSON output, colored terminal output, and tunable concurrency/timeouts

Installation

Clone or fork the repository:

git clone https://github.com/Snyxex/Network_Scanner.git

cd Network_Scanner

Install dependencies:
npm install

Make the script executable (optional):
chmod +x netscanner.js

Usage

Run directly with Node.js (examples below):

node netscanner.js <target|file_of_targets> <ports|auto|ports_file.txt> [options]

Common options:

• --open-only : only print open ports
• --json <out.json> : write detailed JSON output
• --dns : gather DNS records (A/AAAA/MX/NS/TXT)
• --subdomains <wordlist> : discover subdomains using the provided wordlist
• --sub-limit N : stop after N discovered subdomains (default 100)
• --banner : attempt banner grabbing on open ports
• --tls : fetch TLS certificate info for open ports
• --timeout ms : per-connection timeout in milliseconds (default 3000)
• --concurrency N : number of concurrent workers (default 300)

If you prefer to install the CLI locally:

npm link
netscanner <target> <ports> [options]

Examples

Scan a single domain with default auto ports:

node netscanner.js example.com auto

Scan a domain and collect DNS records and TLS info:

node netscanner.js example.com 80,443 --dns --tls --json out.json

Scan a list of targets from a file and discover subdomains with a wordlist:

node netscanner.js targets.txt auto --subdomains subwordlist.txt --sub-limit 200 --banner --json results.json

Scan an IP range using CIDR and a ports file:

node netscanner.js 192.168.1.0/24 ports.txt --concurrency 200

Output

• Terminal: live colored listing of open (and optionally closed) ports
• CSV: results.csv with fields including label, IP, port, status, domain, banner, and TLS info
• JSON: when --json out.json is provided, full structured results are written

Notes

• Subdomain discovery requires a wordlist file (not included). Use a focused wordlist to limit noisy scans.
• Always obtain authorization before scanning targets you do not own.
• Banner grabbing and TLS probes will increase scan duration; tune --timeout and --concurrency appropriately.

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.