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Keep-Alive

Flow:

Server            Client
  │── Ping (3928) ──>│
  │                  │
  │<─ Pong (2596) ───│

S→C 3928 - Ping​

Keepalive ping from server. Client must reply with C→S 295 (Pong) to maintain the connection.

C→S 2596 - Pong​

Nitro: CLIENT_PONG - Nitro adds CLIENT_ prefix.

The server sends Ping (3928) once during login and expects Pong (2596) in response. The server also uses an idle timeout (configured via Netty IdleStateHandler: read=30s, write=60s) - no explicit keepalive loop after the initial Ping/Pong exchange.

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