Centos 8 kvm bridged guest (OS type hvm) can only communicate with host

A little stumped with my kvm host, especially since I setup the exact same situation on a different host and it works well. I have a proxmox Centos 8 vm that I've had to setup as a kvm host, with a single interface and multiple network bridges for kvm guests. So the vms have to be type hvm (nested hypervisor). I setup a kvm guest (vyos vm) on a bridged interface, expecting it to be able to communicate with the host network, but unless I setup firewalld masquerading, the guest cant communicate with the host's gateway and network, only with the host itself, host + guest can ping each other. Host sysctl.conf is normal: net.ipv4.ip_forward = 1 net.ipv4.conf.all.proxy_arp = 1 net.bridge.bridge-nf-call-arptables = 0 net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 Firewalld as well: firewall-cmd --list-all public (active) target: default icmp-block-inversion: no interfaces: br0 br1 ens18 sources: services: cockpit dhcpv6-client ssh ports: protocols: forward: no masquerade: no forward-ports: source-ports: icmp-blocks: rich rules: The nested vm: virsh dominfo Id: 1 Name: UUID: 6ce2fae5-2e57-428b-ad29-49a067866161 OS Type: hvm State: running CPU(s): 4 I havent noticed anything else. Please help, anyone!