TCP keepalive 参数配置

sudo sysctl net.ipv4.tcp_keepalive_time=900 # 连接空闲900秒后 开始发送探针
sudo sysctl net.ipv4.tcp_keepalive_intvl=60 # 探针之间间隔60秒
sudo sysctl net.ipv4.tcp_keepalive_probes=5 # 总共发送5次探针

net.ipv4.tcp_keepalive_time = 900
net.ipv4.tcp_keepalive_intvl = 60
net.ipv4.tcp_keepalive_probes = 5