New Proxmox install can't access local network devices

Installation
1

I just followed this guide to setup a new Home Assistant VM in Proxmox:

It mostly went smoothly - I can access HA with the correct IP from my computer, and I can access the Proxmox web interface. Both have a DHCP lease with the correct MAC/IP in my router.

The issue that I’m having is that HA can’t seem to connect to other devices on my local network. Zigbee and Zwave work great and so do cloud devices, but I can connect to local network devices (e.g. Shelly):
image

I cannot ping any of the devices from HA or Proxmox even though they are on the same local network.

Any thoughts on how to resolve this?

2

Hi Eric, you might want to give your Proxmox and HA a fixed IP to prevent issues in the future.
Can you ping the other devices on your LAN from Proxmox/HA?

3

Thank you for the reply. Both Proxmox and HA have fixed IP addresses and I cannot ping other devices on my LAN from either.

4

But this is not your problem now.

I guess they are both on the same subnet, what about the firewall in Promox?
I haven’t watched that video, so I don’t know how he has setup Proxmox and HA but you might also have a look at Proxmox VE Helper-Scripts & Other News