Two hands-on cybersecurity games: run a replay attack yourself, then defend a server by building your own IDS/IPS.
🔁 Replay Attack Simulator
A replay attack is when an attacker captures a legitimate message and resends it later to trick a system into accepting it again. Intercept a live packet below, then try replaying it — with the real-world defense on, and then off — to see why it matters.
🚫 Replays Blocked: 0
⚠️ Replays Succeeded: 0
Watch the wire — legitimate packets are sent automatically
every few seconds. Intercept one, then try to replay it!
🛡️ Build Your IDS/IPS
Packets are heading for your server. Click a packet to block it before it arrives. Block wisely — blocking real traffic frustrates users, but letting an attack through damages your server!
✅ Benign: HTTP Request, DNS Query, Software Update, Normal
Login
⚠️ Malicious: SYN Flood, Brute Force, SQL Injection, Port
Scan
Score: 0
Server Health:
Click "Start Game" to begin defending your server!