🌐 Exploring DNS Behavior in Local Environments

✨ Description

The Domain Name System (DNS) functions as the Internet’s phone book, translating hostnames into IP addresses and vice versa. This translation process, known as DNS resolution, happens behind the scenes.

DNS attacks exploit vulnerabilities in this resolution process to redirect users to unintended, often malicious, destinations.

The goal of this lab is to explore how these attacks operate. Participants will:

1. Set up and configure a DNS server.
2. Execute various DNS manipulations within a controlled lab environment to understand their impact and mechanisms.

(Replace "image-link" with the actual image URL)

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💻 Languages and Utilities Used

• Python
• Ubuntu 20.04 VM

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🖥️ Environments Used

• Windows 11 Home (21H2)

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🧑‍🏫 Lab Topics Covered

• DNS server setup
• DNS cache poisoning attack
• Spoofing DNS responses
• Packet sniffing and spoofing
• The Scapy tool
• Shell script commands:

./dc-build.sh  # Build the docker images; can take an additional parameter, e.g. ./dc-build.sh --no-cache
./dc-up.sh  # Start the docker containers in the foreground
./dc-up-d.sh  # Start the docker containers in the background
./dc-stop.sh  # Stop the docker containers; can take an additional parameter for the stop process
./dc-down.sh  # Stop and remove the docker containers; can take an additional parameter for the stop and remove process
./dc-unittest.sh  # Utility script to run a specific unit test class