The Firewall That Never Saw the Request

Scenario

Replies are dropped by a firewall that never saw the request.

Learning objectives

• asymmetric routing
• stateful firewall
• connection tracking
• troubleshooting

Topology and configuration

This environment uses a virtual network of routers, hosts, and other network devices. You configure and troubleshoot the networking skills listed above.

Curriculum topics

• Network Security and Access Control / Direction and State

Environment

Subnetica labs run FRRouting and Linux networking with Cisco-like syntax, not Cisco IOS. Commands and behavior may differ from Cisco devices.

Addressing is regenerated on every attempt and the environment is graded automatically.