Network Diagnostics Tool

A Python command-line network diagnostic utility — run DNS lookups, ping tests, port scans, and HTTP probes against any host or IP in one command. No need to remember individual ping, nmap, or curl flags.

Features

• DNS resolution — resolve hostnames to IPs with response time
• Ping test — ICMP packet loss summary with configurable count and timeout
• Port scanner — check common services (SSH 22, HTTP 80, HTTPS 443, MySQL 3306, Redis 6379, etc.)
• HTTP probe — check response code and server headers
• Export results to a timestamped text file with --export
• Color-coded output: green = open/reachable, red = closed/failed
• No external dependencies — pure Python standard library (socket, subprocess, urllib)

Requirements

• Python 3.7+
• No pip install needed

Installation

git clone https://github.com/jonatakuzi/network-diagnostics.git
cd network-diagnostics

Usage

Basic scan (DNS + ping + common ports)

python netdiag.py google.com
python netdiag.py 192.168.1.1

[ DNS ]  google.com → 142.250.80.46  (2ms)
[ PING ] 4/4 packets received, 0% loss, avg 11ms
[ PORTS ]
  22  SSH     closed
  80  HTTP    open
  443 HTTPS   open

Scan specific ports

python netdiag.py github.com --ports 22 80 443 9418

HTTP probe

python netdiag.py example.com --http

Custom ping count and timeout

python netdiag.py 10.0.0.5 --count 10 --timeout 2

Export results to file

python netdiag.py example.com --export

Saves to netdiag_example.com_20241115_143201.txt

Tech Stack

• Python 3.7+
• Standard library: socket, subprocess, urllib, argparse, datetime