TrueNAS can't ping VM but VM can ping TrueNAS

Apps and Virtualization
1

Hello,

I have a strange problem with a SCALE system (23.10.2):
I installed a Win11 VM on it and it works ok, i have followed the official docs and created a bridge.
The VM has internet access and can ping the TrueNAS host just fine.
However from TrueNAS I can’t ping the VM and i cannot understand why.

I also have another TrueNAS system on the same version with an Ubuntu VM and by doing the same process of setting up a bridge etc. I can ping the VM from TrueNAS just fine.

Any help would be greatly appreciated, thanks.

2

Without further information that’s hard to tell. I don’t have a Windows VM so I can’t quickly verify if it’s related to that specific VM.
Can you show your network setup?

3

TrueNAS network setup is as follows:

image
image998×594 90.9 KB

enp0s31f6 is a member of br0

The VM has a static IP (192.168.1.98) configured on the NIC in windows (VirtIO NIC, but i even tried the Intel one and i have the same issue).

4

If you configured the NIC in windows and didn’t use default settings, maybe also show that.

Just to confirm, when you ping .98 you get a timeout / unreachable?

What does

ipconfig

yield in windows?

I’d suspect the windows VM is reachable under a different IP than you expect.

Do an

arp-scan

from one of your Linux machines on the Network.

5

I have a limit of only one image per post so here is a quick MS paint job of the three screenshots:

image
image879×860 141 KB

When i ping the VM from TrueNAS i don’t get any response, the command just hangs until i press CTRL+C and then it shows me the statistics, 100% packet loss

On this network i don’t have any other Linux machines unfortunately.
I have tried the

ip neigh | grep br0

command on TrueNAS and it returns the correct MAC addr of the VM it seems.

6

Ok so it seems it was Windows firewall blocking pings apparently, i have never seen windows firewall blocking pings but whatever, after i completly disabled the fw it works fine and i can ping the VM from TrueNAS.

I face another issue however, i have Tailscale installed as an app on TrueNAS and it works, to a degree.
In fact i can remotely access all the devices on the same LAN as the NAS but the VM and my end goal is exactly RDPing into the VM remotely via Tailscale.

7

After seeing your settings that would have been my next guess, but I’ve never had a Windows machine not respond to ping in its default settings.

For your second question, I don’t use the app, check this link,.maybe it’s related

8

Tried rolling back to Tailscale v. 1.54 but the issue persists.
With both 1.54 and 1.62.1 i can remotely ping and access other devices on the LAN, the only thing i can’t ping is the VM.

9

Just to double check, I’m not a Tailscale veteran, I’m looking into it myself currently.

What routes are you advertising in Tailscale?
Can the VM reach the other Tailscale nodes?

Can you deploy Tailscale in a docker container to see if it’s just the app or if there is another problem why it doesn’t work?