NAT VPS Port Forwarding
OpenVZ packages have 19 public ports forwarded to your VPS (20 in total including SSH port). Your ports range is determined using the following formula
Start port - Your SSH port+1
End port - Your SSH port+19
For example, your SSH port is 50000, then your start port will be 50001 and end port will be 50019. Ports have both TCP&UDP enabled.
Port 80 can be opened using a reverse proxy approach. You will need to provide your domain name if you want it opened.