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Install Shadowsocks-libev + simple-obfs on Ubuntu 16.04

Install Shadowsocks-libev + simple-obfs on Ubuntu 16.04

Install shadowsocks-libev via Ubuntu PPA

sudo apt-get install software-properties-common -y
sudo add-apt-repository ppa:max-c-lv/shadowsocks-libev -y
sudo apt-get update
sudo apt install shadowsocks-libev

Install simple-obfs

sudo apt-get install --no-install-recommends build-essential autoconf libtool libssl-dev libpcre3-dev libev-dev asciidoc xmlto automake
git clone https://github.com/shadowsocks/simple-obfs.git
cd simple-obfs
git submodule update --init --recursive
./autogen.sh
./configure && make
sudo make install

Make obfs-server able to listen on port 443

setcap cap_net_bind_service+ep /usr/local/bin/obfs-server

Server configuration

Add below to /etc/shadowsocks-libev/config.json

{
    "server":"0.0.0.0",
    "server_port":443,
    "local_port":1080,
    "password":"ChangeMe",
    "timeout":300,
    "method":"chacha20-ietf-poly1305",
    "workers":8,
    "plugin":"obfs-server",
    "plugin_opts": "obfs=tls;obfs-host=www.bing.com",
    "fast_open":true,
    "reuse_port":true
}

Start shadowsocks-libev server

systemctl enable shadowsocks-libev.service
systemctl start shadowsocks-libev.service
systemctl status shadowsocks-libev.service

Optimizations

Install & enable BBR TCP congestion control

apt install --install-recommends linux-generic-hwe-16.04
apt autoremove
modprobe tcp_bbr
echo "tcp_bbr" >> /etc/modules-load.d/modules.conf
echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p

MISC

Add below to /etc/sysctl.d/local.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_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

Reboot

reboot

Client configuration

Add below to /usr/local/etc/shadowsocks-libev.json

Note that the plugin has to be absolute path in order to be able to use brew services start shadowsocks-libev.

{
    "server":"SERVER",
    "server_port":443,
    "local_address": "127.0.0.1",
    "local_port":1080,
    "password":"PASSWORD",
    "timeout":300,
    "method":"chacha20-ietf-poly1305",
    "workers":8,
    "plugin":"/usr/local/bin/obfs-local",
    "plugin_opts": "obfs=tls;obfs-host=www.bing.com",
    "fast_open":true,
    "reuse_port":true
}
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