CS155: Network Security

This repo contains my implementation of Stanford's CS155 Computer Security course Project #3, which focused on network security.

Overview

1. Port Scanning: Used nmap to analyze open ports and services on a remote server
2. Packet Sniffing: Analyzed network traffic using Wireshark to understand protocol behaviors
3. Programmatic Packet Processing: Implemented a network traffic analyzer in Go to detect port scanning and ARP spoofing attacks
4. Monster-in-the-Middle Attack: Created a DNS spoofing attack that hijacks HTTP connections, implementing ARP spoofing, DNS spoofing, and HTTP traffic interception

Technologies Used

• Go (golang)
• nmap
• Wireshark
• Docker
• gopacket library

Setup Instructions

1. Install required tools:

   • nmap
   • Wireshark
   • Go
   • Docker

2. Install Go dependencies:

go mod download

3. For Part 4 testing:

bash start_images.sh
bash run_client.sh
bash stop_images.sh