TrueNAS GUI not loading in EVE-NG – IP reachable, ping OK, web UI stuck on loading

[th@cml.pl]

Hi,

I’m having an issue with TrueNAS (CORE/SCALE) running as a QEMU node in EVE-NG.

Problem description
• TrueNAS VM boots correctly
• It gets an IP address (static or DHCP)
• Ping works from multiple clients
• However, Web GUI does not load
– browser shows loading screen or hangs indefinitely
– happens from Windows and Linux clients
– tried different browsers

So network connectivity exists, but the GUI never fully renders.

Environment
• EVE-NG (bare metal)
• TrueNAS running as QEMU VM
• Network adapter: virtio
• Management access via browser from LAN
• No firewall in between (direct access)

What we already tried
• Verified IP configuration on TrueNAS
• Confirmed ping and basic connectivity
• Checked MTU consistency (no mismatch)
• Disabled TCP offloading on the client side
• Tested from different OSes (Windows / Ubuntu)
• Restarted middleware / services
• Rebooted VM multiple times
• Changed CPU type
• Changed NIC type
• Tested Clock setup for proper zone/time for all vm's

Observations
• Issue looks not like a routing or IP problem
• More like:
• virtio NIC / driver interaction
• offloading / packet handling issue
• GUI backend reachable but frontend requests not completing

Question

Has anyone seen TrueNAS GUI hanging on loading screen in EVE-NG, especially with virtio NIC?
• Is this a known incompatibility?
• Any recommended QEMU options or template tweaks?

Any hints or confirmed working setups would be appreciated.

Thanks.

[rusty725]

try different qemu versions in the node settings. try a different true nas version.

[th@cml.pl]

I tested all available QEMU versions and the result is always the same. Regarding TrueNAS, I also tested OpenMediaVault and the behavior is identical.
The VM boots correctly, obtains an IP address via DHCP, and basic network connectivity works — I can ping the management IP without any issues. However, the web GUI never loads properly: the page starts loading but gets stuck indefinitely.

I tested access from both Linux and Windows clients with the same result.
MTU settings were verified and matched on all involved interfaces. I also disabled TCP offloading features on the VM’s network interface, but it made no difference.

The VM is running on EVE-NG using a virtio network adapter. At this point, it does not look OS-specific, as both TrueNAS and OpenMediaVault show the same issue, e1000 and RTL8139 drivers also was tested.

[Uldis (UD)]

Not sure which version do you run, but Free NAS works well

[Uldis (UD)]

By the way True NAS works as well. After you changed truenas_admin password, reboot your device.. all works