Firewall on Kimsufi - Proxmox

So I followed this guide here: http://ift.tt/1gHspTv

In which I created my VM with Server 2012 R2 Datacenter.

But my main issue is that I need to open ports, in which I can open them within the VM, via Windows Firewall. But I have been using SSH into my Host, and tried to add the ports to the IP Table, ie.

iptables -t nat -A PREROUTING -i vmbr0 -p tcp --dport 8080 -j DNAT --to 192.168.0.1:8080

But the Firewall is still not opening the port. Just wondering if there is any advice on what to do, as I have been trying to get this issue fixed for 3 days now, and Googling it isnt helping in any case.

Thanks.

http://ift.tt/1dvHQ0Z