在vps主机上***

一、安装 Shadowsocks服务端：

1、下载软件包

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

2、创建配置文件： /etc/shadowsocks.json

{
    "server":"1.2.3.4",
    "server_port":8888,
    "local_port":1080,
    "local_address": "127.0.0.1",
    "password":"your password",
    "timeout":600,
    "method":"aes-256-cfb"
}

 3、启动服务：

ssserver -c /etc/shadowsocks.json -d start   # 启动
ssserver -c /etc/shadowsocks.json -d stop    # 停止

4、内核优化：

修改limits.conf 添加两行

vi /etc/security/limits.conf

* soft nofile 51200
* hard nofile 51200

执行

ulimit -n 51200

修改/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

修改后执行sysctl -p使配置生效。

二、配置Shadowsocks客户端：

把系统代理模式改为全局代理