permission denied - invalid PVE ticket (401)

brads

New Member
Nov 9, 2025
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I am continuing to get this message.

Proxmox 9 version is the same. Time is the same. Firewall ports are set at the datacenter and server levels.

Server 1:
vmbr0 is a 1G Ethernet (set with primary IP, set default gateway, set DNS)
vmbr1 is a 1G Ethernet (set 10.0.0.1/24, nothing else is set.)

Server 2:
vmbr0 is 10G Ethernet (set with primary IP, set default gateway, set DNS)
vmbr1 is a 1G Ethernet (set 10.0.0.2/24, nothing else is set.)

Test #1:
Cluster configured on vmbr1. Failed.

Test #2:
Removed VLAN configuration on switch. Cluster configured on vmbr1. Failed.

Test #3:
Cluster configured on vmbr0. This was successful.

Any ideas on what may be happening on the vmbr1 configuration?

Any help will be greatly appreciated.
--Brad
 
Last edited:
Is this about the datacenter manager? Or about configuring a pve cluster? I think you picked the wrong topic ^^

Anyway. As it works with vmbr0 and the 10G ports, check if the 1G networks on both nodes can ping each other.

Best if you share /etc/network/interfaces from both nodes.

As you said time is the same, when and where exactly do you get this invalid pve ticket error?
 
Hi,

This is about pve cluster.

Using just the 1G Ethernet ports, I was unable to ping between them.

The error happens if I use the 10.0.0.x Linux Bridges (vmbr1).

So yes, there is an issue, but I am unsure if the issue is with the way I configured the bridge or something else.
 
Please send the output of both command on both nodes:

1. cat /etc/network/interfaces
2. ip a

If they cant even ping each other, there most likely is an issue with your network beyond pve or the pve configuration itself. I can rule out the pve configuration if you send me the output of the above commands.