【tcp】TCP协议的KeepAlive机制与HeartBeat

How do I remove a CLOSE_WAIT socket connection
https://stackoverflow.com/questions/15912370/how-do-i-remove-a-close-wait-socket-connection

Linux. Orphaned connections in CLOSE_WAIT state ( a lot of connections are in CLOSE_WAIT state )
https://dhelios.blogspot.com/2013/09/linux-orphaned-connections-in-closewait.html

浅谈CLOSE_WAIT
https://blog.huoding.com/2016/01/19/488

分享一次排查CLOSE_WAIT过多的经验
https://www.cnblogs.com/chopper-poet/p/14618391.html

再谈 TCP 的 CLOSE_WAIT
https://www.easyice.cn/archives/320

This is strictly a violation of the TCP specification
https://blog.cloudflare.com/this-is-strictly-a-violation-of-the-tcp-specification/

TCP and heartbeats
https://250bpm.com/blog:22/

TCP长连接时系统配置的参数net.ipv4.tcp_keepalive_time不生效
https://www.cnblogs.com/bugutian/p/12939473.html

TCP协议的KeepAlive机制与HeartBeat心跳包
http://www.nowamagic.net/academy/detail/23350382

TCP Keepalive HOWTO
https://tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/

理解TCP之Keepalive
https://www.cnblogs.com/alpha1981/p/12020588.html