A simple Python tool that extracts open ports from Nmap output and prints them in clean host:port format, perfect for recon workflows.

README.md

A lightweight Python tool that parses Nmap output and extracts open ports in clean host:port format.
Perfect for bug bounty and recon workflows.

Features

• Reads directly from stdin
• Extracts hostnames or IPs with their open ports
• Minimal, fast, and easy to chain in pipelines

Usage

nmap -iL targets.txt -p 80,443,22 -sS -Pn -oN - | python filter.py

filter.py

import sys
import re

def filter():
    host = None
    for line in sys.stdin:
        line = line.strip()
        if line.startswith("Nmap scan report"):
            parts = line.split()
            if len(parts) >= 5:
                host = parts[4]
        elif "open" in line:
            match = re.match(r"(\d+)/tcp\s+open", line)
            if match and host:
                port = match.group(1)
                print(f"{host}:{port}")

if __name__ == "__main__":
    filter()