Networking Lab

Fix deliberately broken cloud network infrastructure. Learn by troubleshooting real incidents.

Choose Your Cloud

What You'll Learn

• Routing & Gateways — NAT gateways, route tables, internet egress
• DNS Resolution — Private DNS zones, service discovery
• Network Security — Security groups, firewall rules, subnet isolation
• Troubleshooting — Real-world diagnostic techniques

How It Works

• Infrastructure deploys with intentional misconfigurations
• Incident tickets describe symptoms — you find the fix
• Diagnose issues by SSHing into VMs through a bastion host
• Fix issues from your local machine using cloud provider CLI (az, aws, gcloud)
• Validate fixes from your local machine — the script tests connectivity via SSH

Having Trouble?

Please use GitHub Issues for bugs, broken instructions, or unclear steps:

• Open an issue: GitHub Issues
• Include: cloud/provider, which incident/step you’re on, what you expected vs what happened, and the output of the validation script (redact secrets/tokens).

Cost

~$0.50–1.00 per session. Always destroy resources when done.

Contributing

The infrastructure is intentionally misconfigured — that is the point of the lab. Students fix issues using the cloud provider CLI (az, aws, gcloud), not by editing Terraform. When contributing, do not "fix" broken resources in the Terraform code. If you discover a teardown issue, the right place to address it is in the provider's destroy.sh script or in a README troubleshooting note, not by modifying the Terraform modules.