linux网络优化

syzxlyx_cu

禁止发送重定向
net.ipv4.conf.eth1.send_redirects = 0
net.ipv4.conf.eth0.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.all.send_redirects = 0
不接受icmp重定向
net.ipv4.conf.eth1.accept_redirects = 0
net.ipv4.conf.eth0.accept_redirects = 0
net.ipv4.conf.lo.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.accept_redirects = 0
忽略所有类型的icmp或ping
net.ipv4.icmp_echo_ignore_all = 1
新连接time-wait状态的socket重利用
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
未用tcp并发连接超时时间30分钟
net.ipv4.tcp_keepalive_time = 1800
半连接限制，防Dos攻击
net.ipv4.tcp_max_syn_backlog = 4096
tcp-sack和tcp-dsack优化
net.ipv4.tcp_sack = 0
net.ipv4.tcp_dsack = 0
不接收tcp-timestamp
net.ipv4.tcp_timestamps = 0
禁用tcp窗口扩展
net.ipv4.tcp_window_scaling = 0