net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.ip_local_port_range = 5000 65000
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_max_syn_backlog = 2048
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2

參考：
#kernel.shmmax=67108864
#vm.min_free_kbytes = 65536
#vm.swappiness = 0
#net.core.rmem_max = 33554432
#net.core.wmem_max = 33554432
#net.core.netdev_max_backlog =  2500
#net.core.somaxconn = 262144
#net.ipv4.ip_local_port_range = 5000  65000
net.ipv4.tcp_max_syn_backlog = 2048
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
#net.ipv4.tcp_tw_recycle = 0
#net.ipv4.tcp_tw_reuse = 1
#net.ipv4.tcp_rmem = 4096 16384 33554432
#net.ipv4.tcp_wmem = 4096 16384 33554432
#net.ipv4.tcp_mem = 786432 1048576 26777216
#net.ipv4.tcp_keepalive_time = 300
#net.ipv4.tcp_fin_timeout = 30
#net.ipv4.tcp_max_tw_buckets =360000
#net.ipv4.tcp_max_orphans =32768
#net.ipv4.tcp_window_scaling =1
#net.ipv4.tcp_timestamps =1
#net.ipv4.tcp_rfc1337 =1