> where if you access a link to a network, or access an open networked path after 255 seconds or so this terminology doesn't really make sense in the context o

> where if you access a link to a network, or access an open networked path after 255 seconds or so this terminology doesn't really make sense in the context of a TCP connection. but, anyway, check: net.ipv4.tcp_keepalive_time net.ipv4.tcp_keepalive_probes net.ipv4.tcp_keepalive_intvl docs for the values here: https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt https://www.kernel.org/doc/Documentation/networking/ip-sysct...