shadowsocks_on_vultr.md

How to deploy a shadowsocks server on a Vultr VPS Back

1. Install Shadowsocks via script

Here we are going to use the script of teddysun to install servers of Shadowsocks on the Vultr VPS server automatically:

At first, download the script:

wget --no-check-certificate https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocks.sh

Then change mode of this file to give it privilege to run:

chmod +x shadowsocks.sh

Finally run it:

./shadowsocks.sh 2>&1 | tee shadowsocks.log

If you want to install ShadowsocksR, just download the mirror like the following snippet:

wget --no-check-certificate https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocksR.sh

2. Set the password

3. Set the port

4. Select specific encryption method

According to the document, there is a comparison of encryption methods' speed, testing with 100MB datagram size.

1. x86 + Intel Core i7-6500U

   Encryption Methods	Time Used (ms)
   aes-128-cfb	639
   aes-192-cfb	693
   aes-256-cfb	764
   bf-cfb	1103
   camellia-128-cfb	1038
   camellia-192-cfb	1261
   camellia-256-cfb	1266
   cast5-cfb	1213
   chacha20	307
   des-cfb	1613
   idea-cfb	2066
   rc2-cfb	2214
   rc4-md5	551
   salsa20	263
   seed-cfb	1521
   serpent-cfb	1444

2. x86 + AMD Phenom II X4 N930

   Encryption Methods	Time Used (ms)
   aes-128-cfb	1860
   aes-192-cfb	1984
   aes-256-cfb	2125
   bf-cfb	2563
   camellia-128-cfb	3812
   camellia-192-cfb	4797
   camellia-256-cfb	4828
   cast5-cfb	2766
   chacha20	687
   des-cfb	3563
   idea-cfb	4562
   rc2-cfb	5219
   rc4-md5	2640
   salsa20	875
   seed-cfb	2657
   serpent-cfb	2875

3. ARM + Samsung Exynos 4412 Prime

   Encryption Methods	Time Used (ms)
   aes-128-cfb	3837
   aes-192-cfb	4089
   aes-256-cfb	4443
   bf-cfb	4320
   camellia-128-cfb	5920
   camellia-192-cfb	7058
   camellia-256-cfb	7057
   cast5-cfb	4730
   chacha20	1297
   des-cfb	8147
   idea-cfb	6678
   rc2-cfb	8846
   rc4-md5	3170
   salsa20	1666
   seed-cfb	6941
   serpent-cfb	4440

5. TCP Fast Open

To enhance the speed of connection, you can do more with followed steps:

1. Add the followed line into the file /etc/rc.local:

   # /etc/rc.local
   echo 3 > /proc/sys/net/ipv4/tcp_fastopen

2. Add the followed line into the file /etc/sysctl.conf:

   # /etc/sysctl.conf
   net.ipv4.tcp_fastopen = 3

3. Modified the attribute fast_open with true in the file /etc/shadowsocks.json
4. Restart the server of Shadowsocks:

   /etc/init.d/shadowsocks restart