server_timeout_client_connection

In a server-to-client connection, if the server does not receive a heartbeat for a period exceeding this limit (in seconds), it closes the connection. 

server_timeout_client_connection = limit

We recommend setting this value to approximately 3 times the heartbeat interval, as it is specified in client_heartbeat_server.

Note: If you do not set the client_heartbeat_server parameter when a server_timeout_client_connection is specified, a configuration error is generated during startup. If CONFIG_ERRORS is part of the startup_abort_list, the server will not start. If not, the error is printed but the server starts, and clients will be disconnected after server_timeout_client_connection seconds.

Zero is a special value, which disables heartbeat detection in the server (although clients still send heartbeats).