Thanks for the help.
I've tried to add shaper option in the server config. But I got this error which would not let the server start:
Options error: --shaper cannot be used with --mode server
This is the server config:
mode p2p
port 1194
proto udp
dev tun
server 10.0.0.0 255.255.255.0 #you may choose any subnet. 10.0.0.x is used for this example.
;ping 10
;ping-exit 40
shaper 25000
ca ca.crt #certs are optional. you may choose to go with keys or passwords instead.
cert server.crt
key server.key
dh dh1024.pem
push "redirect-gateway def1"
push "dhcp-option DNS 8.8.8.8"
;push "ping 10"
;push "ping-exit 40"
push "shaper 25000"
;push "dhcp-option DNS 10.0.0.1"
;push "route-metric 512"
;push "route 0.0.0.0 0.0.0.0"
#the following commands are optional
keepalive 10 120
comp-lzo
persist-key
persist-tun
verb 3