This post is under the environment of Ubuntu 18.04, this instruction will guide how to install shadowsocks libev both server side and client settings manually. And show the step to configure the simple-obfs.

The source code is in following two repositories:

You can manually build and install yourself. But under Ubuntu 18.04, you can just install like this:

sudo apt install shadowsocks-libev simple-obfs

and the configuration is under /etc/shadowsocks-libev/. You can manullay modify it and make it work.

If your system is before Ubuntu 18.04, you have to build it from source.

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
cd simple-obfs
git submodule update --init --recursive
./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~

    "plugin_opts": "obfs=tls;",

Start ~shadowsocks-libev~ server

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


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


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



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~.

    "local_address": "",
    "plugin_opts": "obfs=tls;",