[TOC]

安装

1 2	yum install python-setuptools && easy_install pip pip install shadowsocks

创建配置文件

1 2	sudo mkdir /etc/shadowsocks sudo vi /etc/shadowsocks/shadowsocks.json

{
    "server": "0.0.0.0",
    "server_port": 8838,
    "method": "rc4-md5",
    "password": "abcd1234"
}

启动

1	ssserver -c /etc/shadowsocks/shadowsocks.json -d start

停止

1	ssserver -c /etc/shadowsocks/shadowsocks.json -d stop

端口

服务器的TCP端口8838要放行

优化

最大连接数

提高最大连接数,添加如下参数

vim /etc/security/limits.conf

* soft nofile 51200
* hard nofile 51200

内核参数

调整内核参数的目标是：

1.尽可能重用连接和端口号

2.尽可能增大队列和缓冲区

3.为高延迟和高流量选择合适的TCP拥塞算法

vim /etc/sysctl.conf

fs.file-max = 51200
net.core.rmem_max = 67108864
net.core.wmem_max = 67108864
net.core.netdev_max_backlog = 250000
net.core.somaxconn = 4096
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 0
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.ip_local_port_range = 10000 65000
net.ipv4.tcp_max_syn_backlog = 8192
net.ipv4.tcp_max_tw_buckets = 5000
net.ipv4.tcp_fastopen = 3
net.ipv4.tcp_mem = 25600 51200 102400
net.ipv4.tcp_rmem = 4096 87380 67108864
net.ipv4.tcp_wmem = 4096 65536 67108864
net.ipv4.tcp_mtu_probing = 1
net.ipv4.tcp_congestion_control = hybla

使生效

sysctl -p