What are the differences in the configuration of the network on Proxmox (KVM)?

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http://serverfault.com – I have a dedicated server, one main public IP from /27 and two single public IPs also from the same /27 (I think the provider manages single IPs using the VLAN tags). I want to have a KVM running on the server and two VMs on the KVM. I would like not to use NAT or Bridge model, but setting a KVM Host as router, so I can access the VMs from the Internet. It should look like here: I found two different tutorials one saying auto eth0 iface eth0 inet !!manual!! auto br0 iface br0 inet static address x.x.x.x pointtopoint x.x.x.1 gw x.x.x.1 bridge_ports !!eth0!! ... and another sa (HowTos)