← из прошлого урока
You handled the static side: the tables of interfaces, routes, and sockets. Now you see what flies between them physically. A pcap tab opens on the right and shows every packet on the interface.
Средний
12 мин · урок входит в курс «Средний»
In this lesson a packets tab opens on the right. It shows every packet that passes through the chosen interface in real time. Under the hood it is a plain cmd-tcpdump in the container; a parser pulls out the L3/L4 headers and sends them to the frontend.
You run an icmp ping and see echo-request/echo-reply. Then the tcp-handshake (SYN, SYN-ACK, ACK) when you connect to a local HTTP server.
Чтобы запустить sandbox и пройти этот урок целиком, нужен соответствующий курс. Внутри - ещё много практических уроков того же уровня и сквозной прогресс.
дальше →
You saw SYN/SYN-ACK/ACK on a single host. Next come three containers,
two links, and routing wired up between them by hand. There you also
learn why ip_forward is needed and what a default route is.