advanced·20 min·Payant
Replies Leave the Server, But Never Reach the Client
A permitted inside service answers, but its return traffic disappears at the firewall.
Scénario
Dovetail Museum's outside client can start a permitted session with an inside service, but responses disappear on the way back. Unsolicited connections from the outside must remain blocked. Use the traffic direction and connection state to restore replies without opening a broad path.
Objectifs d'apprentissage
- acl
- nftables
- stateful firewall
- connection tracking
Topologie et configuration
Cet environnement contient 3 appareils (2 Hosts, 1 Router). Vous configurez et dépannez les compétences réseau listées ci-dessus.