I was looking at a proxmox/(pfsense/opnsense) tutorial the other day. They recommend binding the WAN interface to vmbr1 (or anything other than vmbr0) since VMs

I was looking at a proxmox/(pfsense/opnsense) tutorial the other day. They recommend binding the WAN interface to vmbr1 (or anything other than vmbr0) since VMs are created with their ethernet bridged to vmbr0 by default. This configuration is what most people want so it'll be a little less work setting up networking.