Hello,

Yesterday, I installed hamachi under ubuntu 9 and it worked fine. Today, I tried to install and run hamachi under centos vps (openvz). Everytime i start hamachi it says:

Here is the permission of /dev/net/tun:
Is there anybody encountered the problem like mine before? I followed this instruction but it does not work with my centos vps.

Thanks,

Are you starting Hamachi as root?

To be honest, though, I would recommend OpenVPN instead of Hamachi. Hamachi depends on a mediator server to make a connection and as such is open to failure if this server is not available. It also relies on the 5.x.y.z network being unroutable, which, today it is, but tomorrow (however unlikely) that may change.
I am always loath to hang any business on a service that may change or disappear.

OpenVPN is not difficult to set up... not as straightforward as Hamachi, I'll grant you, but not that bad, once you are clear with your requirements.

Yes I started it with root. Well, I will try OpenVPN though I have never use it before. Thank you for your respond.