謎:明明已經把 net.ipv4.tcp_fin_timeout、net.ipv4.netfilter.ip_conntrack_tcp_timeout_fin_wait、net.ipv4.netfilter.ip_conntrack_tcp_timeout_time_wait 都調到 10 秒了,為啥還是有 60 附近的秒數哩?!
~$ netstat -tnao | cut -b 42- |grep TIME_WAIT | sort
123.117.180.2:47670 TIME_WAIT timewait (24.27/0/0)
123.117.180.2:47687 TIME_WAIT timewait (7.83/0/0)
123.117.180.2:47688 TIME_WAIT timewait (7.99/0/0)
123.117.180.2:47689 TIME_WAIT timewait (12.66/0/0)
123.117.180.2:47690 TIME_WAIT timewait (20.88/0/0)
123.117.180.2:47736 TIME_WAIT timewait (13.10/0/0)
123.117.180.2:47759 TIME_WAIT timewait (33.21/0/0)
123.117.180.2:47761 TIME_WAIT timewait (28.48/0/0)
123.117.180.2:47793 TIME_WAIT timewait (33.87/0/0)
123.117.180.2:47804 TIME_WAIT timewait (47.01/0/0)
123.117.180.2:47858 TIME_WAIT timewait (44.61/0/0)
123.117.180.2:47865 TIME_WAIT timewait (42.52/0/0)
123.117.180.2:47971 TIME_WAIT timewait (51.43/0/0)
123.117.180.2:47979 TIME_WAIT timewait (52.00/0/0)
123.117.180.2:47990 TIME_WAIT timewait (53.79/0/0)
123.117.180.2:47992 TIME_WAIT timewait (53.89/0/0)
163.21.245.128:50304 TIME_WAIT timewait (11.30/0/0)
163.21.245.128:50305 TIME_WAIT timewait (13.62/0/0)