Guest can ping Host, but not Gateway

[tmarks1984]

I just finished setting up Proxmox for the first time, but I'm having difficulty with networking the VMs.

I've created a VM and use the default network bridge, vmbr0. My router will assign it an IP via DHCP, and when I run ipconfig from the guest the address shows up. However, I cant get get to the outside world using the guest, cant ping anything with the guest (other than the host), and nothing else on my network can ping the VM.

here is my cat /etc/network/interfaces:

auto lo
iface lo inet loopback

iface enp7s0 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.1.10/24
gateway 192.168.1.1
bridge_ports enp7s0
bridge_stp off
bridge_fd 0


192.168.1.10 is my proxmox server and 192.168.1.1 is my router.

Am I missing something obvious?

 

[tmarks1984]

I also tried this on a second router, set to factory defaults. This yielded the same results. This makes me think there is an issue with something within Proxmox...

 

[Keyninja]

Is the Proxmox firewall enabled?

 

[tmarks1984]

I have tried it both ways, enabled/disabled at the Datacenter level, Node level, and in the VM hardware configuration. I have also tried disabling the firewall in my router.

 

[Keyninja]

OK, next step: let's dig deeper. Try these commands:

ping 192.168.1.1
arping -I vmbr0 192.168.1.1
tracepath 192.168.1.1
arp -a

And let's see what those come back with

 

[tmarks1984]

Run these from Shell in the host, or the command line in the guest? I tried both:


ping 192.168.1.1
- receives responses in the host, but not the guest (Destination Host Unreachable).
arping -I vmbr0 192.168.1.1
- bash: arping: command not found (both host and guest)
tracepath 192.168.1.1
- bash: tracepath: command not found (both host and guest)
arp -a
- bash: arp: command not found (both host and guest)

 

[tmarks1984]

should i be able to run those commands? do i need to install anything extra for them?

 

[tmarks1984]

I was able to work around this issue. I added a USB ethernet adapter to the host machine, then created a new network interface bridged to the USB ethernet adapter.

I'm not sure how to mark this as 'Solved', is that something the moderators do?