配置Sysctl优化服务器的详细教程

来源:爱站网时间:2018-09-19编辑:网友分享
今天小编跟大家分享一篇关于配置Sysctl优化服务器的详细教程,感兴趣的朋友跟小编一起来了解一下吧!

  今天小编跟大家分享一篇关于配置Sysctl优化服务器的详细教程,感兴趣的朋友跟小编一起来了解一下吧!

  配置Sysctl

  编辑此文件:

  nano -w /etc/sysctl.conf

  如果该文件为空,则输入以下内容,否则请根据情况自己做调整:

  # Controls source route verification

  # Default should work for all interfaces

  net.ipv4.conf.default.rp_filter = 1

  # net.ipv4.conf.all.rp_filter = 1

  # net.ipv4.conf.lo.rp_filter = 1

  # net.ipv4.conf.eth0.rp_filter = 1

  # Disables IP source routing

  # Default should work for all interfaces

  net.ipv4.conf.default.accept_source_route = 0

  # net.ipv4.conf.all.accept_source_route = 0

  # net.ipv4.conf.lo.accept_source_route = 0

  # net.ipv4.conf.eth0.accept_source_route = 0

  # Controls the System Request debugging functionality of the kernel

  kernel.sysrq = 0

  # Controls whether core dumps will append the PID to the core filename.

  # Useful for debugging multi-threaded applications.

  kernel.core_uses_pid = 1

  # Increase maximum amount of memory allocated to shm

  # Only uncomment if needed!

  # kernel.shmmax = 67108864

  # Disable ICMP Redirect Acceptance

  # Default should work for all interfaces

  net.ipv4.conf.default.accept_redirects = 0

  # net.ipv4.conf.all.accept_redirects = 0

  # net.ipv4.conf.lo.accept_redirects = 0

  # net.ipv4.conf.eth0.accept_redirects = 0

  # Enable Log Spoofed Packets, Source Routed Packets, Redirect Packets

  # Default should work for all interfaces

  net.ipv4.conf.default.log_martians = 1

  # net.ipv4.conf.all.log_martians = 1

  # net.ipv4.conf.lo.log_martians = 1

  # net.ipv4.conf.eth0.log_martians = 1

  # Decrease the time default value for tcp_fin_timeout connection

  net.ipv4.tcp_fin_timeout = 25

  # Decrease the time default value for tcp_keepalive_time connection

  net.ipv4.tcp_keepalive_time = 1200

  # Turn on the tcp_window_scaling

  net.ipv4.tcp_window_scaling = 1

  # Turn on the tcp_sack

  net.ipv4.tcp_sack = 1

  # tcp_fack should be on because of sack

  net.ipv4.tcp_fack = 1

  # Turn on the tcp_timestamps

  net.ipv4.tcp_timestamps = 1

  # Enable TCP SYN Cookie Protection

  net.ipv4.tcp_syncookies = 1

  # Enable ignoring broadcasts request

  net.ipv4.icmp_echo_ignore_broadcasts = 1

  # Enable bad error message Protection

  net.ipv4.icmp_ignore_bogus_error_responses = 1

  # Make more local ports available

  # net.ipv4.ip_local_port_range = 1024 65000

  # Set TCP Re-Ordering value in kernel to ‘5′

  net.ipv4.tcp_reordering = 5

  # Lower syn retry rates

  net.ipv4.tcp_synack_retries = 2

  net.ipv4.tcp_syn_retries = 3

  # Set Max SYN Backlog to ‘2048′

  net.ipv4.tcp_max_syn_backlog = 2048

  # Various Settings

  net.core.netdev_max_backlog = 1024

  # Increase the maximum number of skb-heads to be cached

  net.core.hot_list_length = 256

  # Increase the tcp-time-wait buckets pool size

  net.ipv4.tcp_max_tw_buckets = 360000

  # This will increase the amount of memory available for socket input/output queues

  net.core.rmem_default = 65535

  net.core.rmem_max = 8388608

  net.ipv4.tcp_rmem = 4096 87380 8388608

  net.core.wmem_default = 65535

  net.core.wmem_max = 8388608

  net.ipv4.tcp_wmem = 4096 65535 8388608

  net.ipv4.tcp_mem = 8388608 8388608 8388608

  net.core.optmem_max = 40960

  如果希望屏蔽别人 ping 你的主机,则加入以下代码:

  # Disable ping requests

  net.ipv4.icmp_echo_ignore_all = 1

  编辑完成后,请执行以下命令使变动立即生效:

  /sbin/sysctl -p

linux

  /sbin/sysctl -w net.ipv4.route.flush=1

  以上就是关于配置Sysctl优化服务器的详细教程,想必都了解了吧,更多相关内容请继续关注爱站技术频道。

上一篇:LINUX系统双线接入服务器详细教程

下一篇:服务器MySQL的优化详细步骤

您可能感兴趣的文章

相关阅读

热门软件源码

最新软件源码下载