[Solved] Optimizing my config for low latency gaming server

deweee

Hello,

Since our campus network is highly restrictive and all the UDP ports are banned, we needed to setup VPN server to overcome this. Without being new to linux, I am new to OpenVPN.

My goal is optimizing my openvpn server to allow gaming over it, with lowest latency possible, over a tcp port.

I have rented various VPS's from various locations and virtualization (right now 1 KVM and 1 OpenVZ) and experimenting with them. Right now I have and KVM server running an OpenVPN server, but not getting any good results at all. Right now I am about to setup my OpenVZ server, >18ms, very close to my location and need your help.

My problems are: Latency spikes, low download and upload line speeds. (Around 10 people using the OpenVPN server, for gaming or browsing)

Finally here is my server.conf: (dnsmasq running)

port 8080
proto tcp
dev tun
ca ca.crt
cert xxx.crt
key xxx.key
dh dh1024.pem
server 10.8.0.0 255.255.255.0
cipher AES-256-CBC
comp-lzo
persist-key
persist-tun
status openvpn-status.log
verb 3
tun-mtu 1500
tun-mtu-extra 32
mssfix 1450
push "redirect-gateway def1"
push "dhcp-option DNS 10.8.0.1"
keepalive 5 30

Regards.

deweee

Thanks but how can I use this options? Are those starting parameters or config customization?

Thanks.

deweee

Hi again,

With some experiment I succeed to have a stable and low-latency server for gaming. While tcp-nodelay doubled the performance, mlock rendered server unstable. I don't recommend it servers with less than 512 mb of ram.

Here is my config for future reference;

port 8888
proto tcp
dev tun
ca ca.crt
cert xxx
key xxx
dh dh1024.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1"
push "dhcp-option DNS 8.8.8.8"
push "dhcp-option DNS 8.8.4.4"
keepalive 10 120
comp-lzo
tcp-nodelay
persist-key
persist-tun
status openvpn-status.log
verb 3