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https://github.com/dunwu/linux-tutorial.git
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64 lines
2.5 KiB
Plaintext
64 lines
2.5 KiB
Plaintext
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###################################################################################
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# /etc/sysctl.conf 文件用于配置 Linux 内核及网络
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# @author: Zhang Peng
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###################################################################################
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# 表示开启重用。允许将TIME-WAIT sockets重新用于新的TCP连接，默认为0，表示关闭；
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net.ipv4.tcp_tw_reuse = 1
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# 表示开启TCP连接中TIME-WAIT sockets的快速回收，默认为0，表示关闭。
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net.ipv4.tcp_tw_recycle = 1
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# 如果套接字由本端要求关闭，这个参数决定了它保持在FIN-WAIT-2状态的时间。
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net.ipv4.tcp_fin_timeout = 2
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# 避免放大攻击
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net.ipv4.icmp_echo_ignore_broadcasts = 1
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# 开启恶意icmp错误消息保护
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net.ipv4.icmp_ignore_bogus_error_responses = 1
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# 开启SYN洪水攻击保护
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net.ipv4.tcp_syncookies = 1
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# 开启并记录欺骗，源路由和重定向包
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net.ipv4.conf.all.log_martians = 1
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net.ipv4.conf.default.log_martians = 1
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# 处理无源路由的包
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net.ipv4.conf.all.accept_source_route = 0
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net.ipv4.conf.default.accept_source_route = 0
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# 开启反向路径过滤
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net.ipv4.conf.all.rp_filter = 1
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net.ipv4.conf.default.rp_filter = 1
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# 确保无人能修改路由表
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net.ipv4.conf.all.accept_redirects = 0
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net.ipv4.conf.default.accept_redirects = 0
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net.ipv4.conf.all.secure_redirects = 0
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net.ipv4.conf.default.secure_redirects = 0
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# 不充当路由器
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net.ipv4.ip_forward = 0
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.default.send_redirects = 0
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# 开启execshild
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kernel.exec-shield = 1
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kernel.randomize_va_space = 1
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# IPv6设置
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net.ipv6.conf.default.router_solicitations = 0
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net.ipv6.conf.default.accept_ra_rtr_pref = 0
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net.ipv6.conf.default.accept_ra_pinfo = 0
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net.ipv6.conf.default.accept_ra_defrtr = 0
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net.ipv6.conf.default.autoconf = 0
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net.ipv6.conf.default.dad_transmits = 0
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net.ipv6.conf.default.max_addresses = 1
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# 优化LB使用的端口
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# 增加系统文件描述符限制
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fs.file-max = 65535
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# 允许更多的PIDs (减少滚动翻转问题); may break some programs 32768
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kernel.pid_max = 65536
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# 增加系统IP端口限制
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net.ipv4.ip_local_port_range = 2000 65535
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# 增加TCP最大缓冲区大小
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net.ipv4.tcp_rmem = 4096 87380 8388608
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net.ipv4.tcp_wmem = 4096 87380 8388608
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# 增加Linux自动调整TCP缓冲区限制
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# 最小，默认和最大可使用的字节数
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# 最大值不低于4MB，如果你使用非常高的BDP路径可以设置得更高
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# Tcp窗口等
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net.core.rmem_max = 8388608
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net.core.wmem_max = 8388608
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net.core.netdev_max_backlog = 5000
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net.ipv4.tcp_window_scaling = 1
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