Defend the network. One packet at a time.

Place towers. Write firewall rules. Watch the wave hit your policy. No signup needed — try it below.

💰 500 | Mode: playing | Wave: active

Place towers, then click Start wave when you're ready.

Personal

Free, forever

Keep playing solo. Save progress, get notified when new scenarios drop.

Structured course

Learn networking and security in order — guided modules, certificates, paid tier.

For your org

Train your IT, helpdesk, or engineering teams. Commercial use, group reporting.