Manny Cassar

2025-02-21

20213773

DNS Client

This project provides a simple DNS client in Python that sends a DNS query to a server and prints the response in a format similar to nslookup.

Features

• Constructs a DNS query following RFC 1035.
• Supports decoding A and CNAME records.
• Pretty-prints the response with server info and answer details.
• Provides helpful usage instructions and troubleshooting tips.

Files

• dnsClient.py: The main Python script that builds, sends, and parses DNS queries.

Requirements

• Python 3.x

Usage

Run the script from the command line: python dns_client.py <hostname> [<dns_server>]

• Without dns_server, the program will query the local router. I suggest testing with 1.1.1.1 or 8.8.8.8 as this parameter.