Experience live command execution. Interact with simulated ARP tables, DNS resolvers, ICMP pings, and asynchronous WAN routing[cite: 1]. Type commands directly into the terminal below.
[System Ready] Welcome to the Live Networking Fundamentals CLI[cite: 1].
Type 'help' to view supported lab commands[cite: 1].
student@net-lab:~$
Interactive Port Mapping Inspector Module 4 & 6[cite: 1]
Test your Layer 4 transport knowledge[cite: 1]. Click on any service button below to instantly inspect its standard protocol and port number assignment[cite: 1].
Click a service above to display Layer 4 encapsulation metrics[cite: 1].
Firewalls monitor and control incoming and outgoing network traffic based on predetermined security rules[cite: 1]. Configure your Access Control List (ACL) rules on the left, then fire simulated test packets from the external WAN network to see how the firewall inspects and filters traffic[cite: 1].
1. Configure Firewall Rules (ACL)[cite: 1]
Rule #1: ICMP (Ping)[cite: 1]
Echo Requests / Diagnostic Traffic[cite: 1]
Rule #2: TCP Port 22 (SSH)[cite: 1]
Remote Administrative Access[cite: 1]
Rule #3: TCP Port 80 (HTTP)[cite: 1]
Unencrypted Web Traffic[cite: 1]
Rule #4: TCP Port 443 (HTTPS)[cite: 1]
Secure SSL/TLS Web Traffic[cite: 1]
Security Note[cite: 1]: Best practice dictates blocking unencrypted remote access (like HTTP or Telnet) from external sources while allowing encrypted tunnels (HTTPS/VPN)[cite: 1].
2. Launch Simulated Test Packet[cite: 1]
[Firewall Engine Active] Waiting for incoming network packets...[cite: 1]