advanced·20 min·مدفوع
Replies Leave the Server, But Never Reach the Client
A permitted inside service answers, but its return traffic disappears at the firewall.
السيناريو
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.
أهداف التعلّم
- acl
- nftables
- stateful firewall
- connection tracking
الطوبولوجيا والإعداد
تحتوي هذه البيئة على 3 جهازًا (2 Hosts, 1 Router). تقوم بإعداد واستكشاف أخطاء المهارات المذكورة أعلاه وإصلاحها.