软件折腾笔记之Shadowsocks

发表于 更新于

服务器配置

安装环境

1
2
sudo apt install python3-pip
sudo -H pip3 install setuptools shadowsocks

优化系统配置

开启TCP BBR拥塞控制算法

  1. 且服务器虚拟化方式为xen或kvm，TCP BBR不支持OpenVZ，检测方式：
1
sudo apt install virt-what && sudo virt-what
  1. 检查内核是否为4.9以上，否则自行升级内核至4.9以上或更换较新的系统
  2. 开启BBR
1
2
3
echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p

输入sysctl net.ipv4.tcp_available_congestion_control检查是否开启成功
输入lsmod | grep bbr检查是否加载成功

优化网络配置

在/etc/sysctl.d/local.conf中添加以下内容

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
# max open files
fs.file-max = 51200
# max read buffer
net.core.rmem_max = 67108864
# max write buffer
net.core.wmem_max = 67108864
# default read buffer
net.core.rmem_default = 65536
# default write buffer
net.core.wmem_default = 65536
# max processor input queue
net.core.netdev_max_backlog = 4096
# max backlog
net.core.somaxconn = 4096
# resist SYN flood attacks
net.ipv4.tcp_syncookies = 1
# reuse timewait sockets when safe
net.ipv4.tcp_tw_reuse = 1
# turn off fast timewait sockets recycling
net.ipv4.tcp_tw_recycle = 0
# short FIN timeout
net.ipv4.tcp_fin_timeout = 30
# short keepalive time
net.ipv4.tcp_keepalive_time = 1200
# outbound port range
net.ipv4.ip_local_port_range = 10000 65000
# max SYN backlog
net.ipv4.tcp_max_syn_backlog = 4096
# max timewait sockets held by system simultaneously
net.ipv4.tcp_max_tw_buckets = 5000
# turn on TCP Fast Open on both client and server side
net.ipv4.tcp_fastopen = 3
# TCP receive buffer
net.ipv4.tcp_rmem = 4096 87380 67108864
# TCP write buffer
net.ipv4.tcp_wmem = 4096 65536 67108864
# turn on path MTU discovery
net.ipv4.tcp_mtu_probing = 1

编写配置文件

新建配置文件/etc/shadowsocks.json，添加以下内容

1
2
3
4
5
6
7
8
9
10
{
    "server":"my_server_ip",
    "server_port": 433,
    "local_address": "127.0.0.1",
    "local_port":1080,
    "password":"mypassword",
    "timeout":300,
    "method":"aes-256-ctr",
    "fast_open": true
}

运行/停止程序

  • sudo ssserver -c /etc/shadowsocks.json -d start
  • sudo ssserver -c /etc/shadowsocks.json -d stop

NOTE

  • 服务器系统推荐选择具有较新内核(>=4.9)的系统，避免升级内核步骤，推荐使用Ubuntu，直接支持tcp fast_open
  • 选购服务器时注意根据自身的地理位置、网络状况来选择合适的服务器提供商，测试指标一般有网速和ping延迟，推荐工具有traceroute，奇云测，服务器提供商官方测速地址

客户端配置

  1. 下载GUI客户端
  2. 添加服务器信息

NOTE

  • 搭配各类软件可实现shadowsocks的多协议、多场景支持，部分如下
软件 协议或场景
proxychains4 命令行
SwitchyOmega chrome浏览器
privoxy sock5转http
  • 首次使用后推荐到处配置信息为URI并保存，方便下次使用时无需输入配置信息