OpenVPN on a OpenVZ VPS.

We get a lot of clients trying to install VPN services on our VPS services, so I decided to write a guide on what your host needs to do.

If you are a ZanyHost client, please create a support ticket asking for TUN/TAP

If you are on a Xen service, just follow with the installation as normal, due to the way kernels and the host is setup on all Xen servers, it should operate just like a dedicated server would do.

However OpenVZ is different, the kernel is shared with the other VPS’s and the main host , with some other changes to the general service.

Basically when you’re setting up your Linux VPN you need to remember to ask you web host to setup the TUN/TAP.

Most control panels like SolusVM will automate some of this; if you don’t have this your host will need to do the following.

Check the TUN kernel module is installed:

 lsmod | grep tun

If not install it:

 modprobe tun

Now run these commands:

vzctl set 101 --devices c:10:200:rw --save

vzctl set 101 --capability net_admin:on --save

vzctl exec 101 mkdir -p /dev/net

vzctl exec 101 mknod /dev/net/tun c 10 200

vzctl exec 101 chmod 600 /dev/net/tun

Replace the number 101 with your client’s VPS ID.

That should be everything done, your client can keep on installing OpenVZ as normal.