Enable Internet Access for a Private Network with a NAT Gateway
Configure a Linux NAT gateway to give Internet access to private RFC 1918 networks while keeping them hidden from the outside world.
Challenges
Focused, hands-on problems for sharpening your DevOps and server-side skills. Some teach specific concepts while others mirror real-world scenarios. Every challenge includes hints, feedback, and automated solution checks.
Configure Routes to Connect Two Private Networks
Hone your Linux networking skills by setting up routing that lets two isolated private networks communicate.
Reproduce a Docker Bridge Network Using Basic Linux Commands
The culmination of the Docker networking challenges series. Can you create a Docker-like bridge network from scratch and using nothing but basic Linux commands.
Submissions: 240/446
Connect Multiple Network Namespaces
Prove your mastery of Linux and containers by connecting multiple network namespaces into a single network.
Submissions: 346/789
Connect Two Network Namespaces
Prove your Linux networking skills by connecting two network namespaces with a virtual Ethernet device.
Submissions: 617/981
Set Up Network Address Translation (NAT) for a Container
There is a container that seems to have access to all host's interfaces but for some reason cannot call any addresses outside of the host. Can you fix it?
Submissions: 338/485
Create a Linux Network Namespace
Learn how to create fully isolated virtual network environment using Linux network namespaces.
Submissions: 1181/1667
Access a Docker Container With No Published Ports
Learn a bunch of Linux networking tricks while trying to access an Nginx server running inside a Docker container with no published ports.
Submissions: 322/414