Hello everyone,
I'm struggling with a networking issue on a Proxmox VE 8 host hosted at Hetzner.
The problem: Everything works fine when the physical interface is configured directly, but as soon as I move the IP to a Linux Bridge (vmbr0), I lose all external connectivity (Host is unreachable and cannot ping 8.8.8.8).
My Setup:
Thanks for your help!
I'm struggling with a networking issue on a Proxmox VE 8 host hosted at Hetzner.
The problem: Everything works fine when the physical interface is configured directly, but as soon as I move the IP to a Linux Bridge (vmbr0), I lose all external connectivity (Host is unreachable and cannot ping 8.8.8.8).
My Setup:
- Hardware: Dedicated server at Hetzner.
- Interface: enp0s4
- Main IP: 95.217.144.57/26 (Gateway: 95.217.144.1)
- MAC Address: I have forced the bridge vmbr0 to use the same hardware MAC as enp0s4 using the hwaddress parameter.
- ARP: Running tcpdump -i enp0s4 shows that ARP requests/replies are working. I see the gateway responding . I also see incoming traffic on port 8006, but the host doesn't seem to send anything back.
- Routing: ip route shows the correct default gateway via vmbr0.
- IP Forwarding: net.ipv4.ip_forward is set to 1.
Thanks for your help!