Restrict SSH Bastion Access by User Role
Harden a bastion host so only admins can get a shell on it, operators can open tunnels to arbitrary destinations, and developers can reach only the one internal service they actually need.
Submissions: 34/55
Challenges
Focused hands-on problems designed to help you hone your DevOps or Server Side skills. Some challenges are more educational, while others are based on real-world scenarios. The platform provides hints and feedback for each challenge, including automated solution checks.
Forward a Port Without Starting a Proxy Process
Prove your networking skills by mapping one network address to another without starting any additional processes.
Submissions: 261/581
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: 218/406
Connect Multiple Network Namespaces
Prove your mastery of Linux and containers by connecting multiple network namespaces into a single network.
Submissions: 320/750
Network Access to a Container Started by ctr
Learn a bunch of Linux networking tricks while trying to access an Nginx server running inside a container started with ctr and a bare containerd daemon.
Submissions: 193/261