apt-get install haproxy
Edit /etc/haproxy/haproxy.cfg
like this(You need to replace IP and port):
global
ulimit-n 51200
pidfile /var/run/haproxy.pid
defaults
log global
mode tcp
option dontlognull
contimeout 10000
clitimeout 150000
srvtimeout 150000
frontend ss-in
bind *:LOCAL_LISTEN_PORT // Local bind port
default_backend ss-out
backend ss-out
server server1 SS_SERVER_IP:SS_SERVER_PORT maxconn 20480
haproxy -f /etc/haproxy/haproxy.cfg
Edit config file: /etc/default/haproxy
ENABLED=1
service haproxy start