I am using Proxmox 7.3, and I created an LXC container based on Ubuntu Template to run a dedicated Node Red instance to act as a bacnet gateway based in Bitpool Edge Bacnet integration. Bacnet communication uses UDP protocol and port 47808. All firewalls deactivated everywhere. The host machine receives UDP packets, but the bridge on the LXC does not pass anything to the guest machine. All UDP communications, not only bacnet.
I created a debian full VM as an alternative, thinking it might have something to do with the way network is configured on LXC containers. The behavior was exactly the same! Strangely, I installed Node-Red on a Windows Server 2019 VM on the same host, and UDP works fine and so does the bacnet Gateway within Node-Red.
Something has to do with Proxmox networking and UDP on Linux VMs
I created a debian full VM as an alternative, thinking it might have something to do with the way network is configured on LXC containers. The behavior was exactly the same! Strangely, I installed Node-Red on a Windows Server 2019 VM on the same host, and UDP works fine and so does the bacnet Gateway within Node-Red.
Something has to do with Proxmox networking and UDP on Linux VMs