netipv4tcpkeepaliveprobes
netipv4tcpkeepaliveprobes is a kernel parameter in Linux that controls the number of unacknowledged probe segments that a TCP connection will send before considering the connection dead. These probe segments are part of the TCP Keepalive mechanism, which is designed to detect and clean up idle, broken connections. When Keepalive is enabled, the system periodically sends small TCP packets to the other end of an established connection. If no response is received after a certain number of probes, the connection is considered to be no longer active and is closed by the kernel.
The value of netipv4tcpkeepaliveprobes determines how aggressive the system is in detecting dead connections. A higher
This parameter is part of a suite of TCP Keepalive settings, which also include netipv4tcpkeepaliveintvl (the