Fast NMAP Filter IP List Maker

run.py

import re
import subprocess
from os.path import exists
# Ask the user for the CIDR range to scan
cidr_range = input("Enter the CIDR range to scan (e.g., '10.10.4.0/22'): ")
if cidr_range == "":
    cidr_range = "10.10.4.0/22"

if not exists("./scan.txt"):
    try:
        # Run the nmap command to perform a ping scan and capture the output
        nmap_command = f'nmap -sn {cidr_range} -oN scan.txt'
        nmap_output = subprocess.check_output(nmap_command, shell=True, universal_newlines=True)
    except subprocess.CalledProcessError:
        print("Nmap command failed. Make sure you have Nmap installed and try again.")
        exit(1)

with open('./scan.txt', 'r') as file:
    nmap_output = file.read()


# Split the nmap output into individual sections for each device
device_sections = re.split(r'Nmap scan report for ', nmap_output)
# Remove the empty string resulting from the split
device_sections = [section for section in device_sections if section.strip()]

# Ask the user for filter keywords (comma-separated)
filter_keywords = "Netgear,Dell".split(",")

# Initialize a list to store the IP addresses that match the filter
filtered_ips = []

# Iterate through the device sections and filter based on the keywords
for section in device_sections:
    print(section)
    should_include = all(keyword.lower() not in section.lower() for keyword in filter_keywords)
    if should_include:
        ip_match = re.search(r'(\d+\.\d+\.\d+\.\d+)', section)
        mac_match = re.search(r'MAC Address: ([\w:]+)', section)
        if ip_match:
            ip_address = ip_match.group(1)
            if mac_match:
                mac_address = mac_match.group(1)
                filtered_ips.append(f"{ip_address}")

# Join the filtered IP addresses with commas and print the result
result = ', '.join(filtered_ips)
print("Filtered IP addresses: " + result)