Networking 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.

Pro Tip: Use filters by category, difficulty, and tags to find challenges that match your proficiency level and interests, or explore our Skill Paths for a more guided learning experience.

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Linux, Networking

Classic Sysadmin Task: Which Port Is a Service Listening On?

Test your Linux and Networking skills by identifying which port a service is using. Sounds easy? Perhaps, but be careful - you only get one shot!

#socket #tcp #os-process

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Linux, Networking

Classic Sysadmin Task: Which Process Is Listening on a Port?

Test your Linux and Networking skills by pinpointing a process that is listening on a given port. Sounds easy? Perhaps, but be careful - you only get one shot!

#socket #tcp #os-process

This challenge was contributed by a guest author.

Challenge, Easy, on Kubernetes, Networking

CKA Practice: Configure Network Policies To Restrict Traffic Between Pods

This exercise tests your ability to configure kubernetes network policies to make sure only pods with specific labels can communicate with each other.

#cka #network-policies

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Kubernetes, Containers, Networking

What Port Does This Kubernetes Pod Listen On?

Be a networking Sherlock Holmes - find out which port a Kubernetes app uses and send a request to it.

#debugging #slim-images #distroless

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Linux, Networking

Forward a Port Using the Hackers' Swiss Army Knife: netcat

Prove your networking skills by setting up an improvised proxy server with netcat.

#port-forwarding #netcat

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Linux, Networking

Forward a Port Using The Multipurpose Relay Tool: socat

Prove your networking skills by mapping one network address to another using socat.

#port-forwarding #socat

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Hard, on Linux, Networking

Forward a Port Without Starting a Proxy Process

Prove your networking skills by mapping one network address to another without starting any additional processes.

#port-forwarding #iptables

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Hard, on Linux, Containers, Networking

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.

#netns #iptables #bridge

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Hard, on Linux, Containers, Networking

Connect Multiple Network Namespaces

Prove your mastery of Linux and containers by connecting multiple network namespaces into a single network.

#netns #veth #bridge

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Linux, Containers, Networking

Connect Two Network Namespaces

Prove your Linux networking skills by connecting two network namespaces with a virtual Ethernet device.

#netns #veth #ip

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Linux, Containers, Networking

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?

#netns #iptables #nat

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Easy, on Linux, Containers, Networking

Create a Linux Network Namespace

Learn how to create fully isolated virtual network environment using Linux network namespaces.

#netns #nsenter #unshare

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Hard, on Linux, Containers, Networking

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.

#containerd #ctr #docker

This challenge was prepared for you by the iximiuz Labs team.

Challenge, Medium, on Linux, Containers, Networking

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.

#containerd #ctr #docker