Welcome to Docker ARP Analysis Documentation!

I’ve been immersing myself in CI/CD pipeline studies lately, and now that I’ve gotten a good grasp of it, I can finally dedicate my full attention to understanding container technologies. To start, I decided to focus on networking, which is the stack I’m most familiar with. In this simple how-to guide, I’ll walk you through observing the Address Resolution Protocol (ARP) in action within a Docker environment. An Address Resolution Protocol(ARP) allows a container to learn the MAC address of another device (in this lab, it’s the bridge and other containers) dynamically. Without an ARP, a ping between containers, external networks, or even a web request between containers and other devices fails.

Table of Contents:

• Requirements
  • Install Homebrew and Multipass
  • Download Multipass
  • Download an Ubuntu Server from Multipass
  • Go to the Shell of the Ubuntu Server
  • Install Docker
  • Mount a Local Folder to an Ubuntu Directory
  • Install Wireshark
• Architecture Deployment Guide
  • Enter into Ubuntu Shell
  • Create a Custom Bridge
  • Verify New Bridge
  • Pull Alpine Image
  • Open New Terminal Tabs and Capture Packets in Each Bridge
  • Create 2 Containers in the Default Bridge, Also Connect Them to the Custom Bridge
  • Send Pings to the Internet From the First Interface
  • Send Pings to the Internet From the Second Interface
  • View MAC Addresses of Each Bridge Interface
  • View MAC Addresses of Each Container Interface
  • End Packet Captures
  • Move the Files to the Local Directory
• View Packet Captures
  • Docker0 Bridge Interface
  • Docker1 Bridge Interface
• Clean-Up
  • Stop and Remove the Container
  • Delete Custom Bridge
  • Verify Network List
  • Stop Ubuntu Server
• Conclusion
• Resources