DNS Response Time Tester

A Python-based tool for measuring and analyzing DNS response times across multiple domains. This tool is particularly useful for testing local DNS servers, comparing DNS providers, and monitoring DNS performance.

Features

• Test DNS response times for multiple domains simultaneously
• Configurable number of queries per domain
• Parallel testing with adjustable thread count
• Comprehensive default domain list (200+ domains)
• Support for custom domain lists
• Detailed statistics including min, max, and average response times
• Summary statistics for overall performance analysis
• Zero external dependencies beyond Python's DNS resolver

Prerequisites

• Python 3.x
• dnspython library

Installation

1. Clone the repository:

git clone https://github.com/14wkinnersley/Local-DNS-Test.git
cd dns-response-tester

2. Install required packages:

# Update package list (Ubuntu/Debian)
sudo apt update

# Install Python if not already installed
sudo apt install python3 python3-pip -y

# Install DNS Python library
pip3 install dnspython

Usage

Basic Usage

python3 dns_test.py --dns-server YOUR_DNS_SERVER_IP

Advanced Options

python3 dns_test.py --dns-server YOUR_DNS_SERVER_IP --domains-file domains.txt --queries 5 --threads 10

Command Line Arguments

• --dns-server: IP address of the DNS server to test (required)
• --domains-file: Path to file containing domains to test (optional)
• --queries: Number of queries per domain (default: 3)
• --threads: Number of concurrent testing threads (default: 5)

Domain Lists

Default Domains

The script includes a comprehensive default list of domains covering various categories:

• Technology & Social Media
• E-commerce & Shopping
• Tech Companies
• Streaming & Entertainment
• Cloud & Infrastructure
• News & Media
• Productivity & Business
• Education & Reference
• Banking & Finance
• CDN & Internet Infrastructure
• Gaming

Custom Domain List

You can create your own domain list file with one domain per line:

google.com
facebook.com
example.com

Sample Output

Testing DNS response times for 192.168.1.13
Testing 200 domains with 3 queries each
----------------------------------------------------------------------
Domain                              Avg (ms)   Min (ms)   Max (ms)   Errors
----------------------------------------------------------------------
cloudflare.com                      2.90       2.11       4.27       0
microsoft.com                       4.64       3.31       5.47       0
google.com                         6.09       2.56       10.44      0
...

Summary:
----------------------------------------------------------------------
Total domains tested: 200
Overall average response time: 15.23 ms
Fastest domain: cloudflare.com (2.90 ms)
Slowest domain: cdn.jsdelivr.net (1805.49 ms)

Files in Repository

• dns_test.py: Main script for DNS response time testing
• domains.txt: Comprehensive list of domains for testing
• README.md: This documentation file

Use Cases

• Testing local DNS server performance
• Comparing different DNS providers
• Monitoring DNS resolution times
• Troubleshooting DNS issues
• Benchmarking DNS server configurations

License

This project is licensed under the MIT License

Acknowledgments

• Uses dnspython for DNS resolution
• Domain list curated from various popular and essential internet services
• Inspired by the need for simple, effective DNS testing tools

Author

(@14wkinnersley)

Support

For support, please open an issue in the GitHub repository.