The Firewall That Never Saw the Request
Replies are dropped by a firewall that never saw the request.
Scenario
Lowell Actuarial added a second path between its server room and the core for resilience. Since then the reporting client cannot reach the analytics server, although the server records the incoming requests and answers them. The security team confirms the return firewall is configured exactly as approved and refuses to loosen it. Restore client access without weakening the firewall.
Learning objectives
- asymmetric routing
- stateful firewall
- connection tracking
- troubleshooting
Topology and configuration
This environment contains 5 devices (2 Hosts, 3 Routers). You configure and troubleshoot the networking skills listed above.
Curriculum topics
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.
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