centos防泛洪攻擊配置

net.ipv4.tcp_fin_timeout = 30 

net.ipv4.tcp_keepalive_time = 1200 

net.ipv4.tcp_syncookies = 1 

net.ipv4.tcp_tw_reuse = 1 

net.ipv4.tcp_tw_recycle = 1 

net.ipv4.ip_local_port_range = 1024 65000 

net.ipv4.tcp_max_syn_backlog = 8192 

net.ipv4.tcp_max_tw_buckets = 5000 

net.ipv4.tcp_synack_retries = 2 

net.ipv4.tcp_syn_retries = 2