Principle of Connection Idle Timeout?

For client requests to the CLB, CLB will maintain two connections. One connects to the client, and the other connects to the backend service node (RS, realserver).

If no data is sent or received after the connection idle timeout period, CLB will close the connection.

By default, connection keeping is enabled in CLB, and the default connection keeping time is 60 seconds. For example, the connection will be kept for 60 seconds after the first packet is sent, and if no new TCP packets are received within 60 seconds from the last packet, the connection will be disconnected. Users can set the threshold for connection idle timeout according to their business needs.

At present, the protocols with connection idle timeout are HTTP, HTTPS, and TCP request proxy mode.