[SOLVED] upgrade from Proxmox 6 to 7 now no WAN access to GUI

[damon1]

Hi Guys,

Proxmox 6 has worked fine for years.
Router is port forwarding the same a before

Updated to proxmox 7 from proxmox 6 (not fresh install)

I can access the GUI via the LAN i.e. https://192.168.0.xxx:8006
but not via the WAN https://www.xxx.com:80xx

which I could before.

Is there something that has to be allowed etc...

Interestingly it worked fine for a few weeks but once I rebooted the server for the first time after the update was completed the WAN can no longer connect.

thanks
Damon

 

[damon1]

I believe I have found the cause for this and the solution.

during the upgrade to 7 it lists a possible problem, in that the MAC address might change for the Linux Bridge
(total Mumbo Jumbo to me)

However when I looked at the one node which did still work using "ip address" in the shell, I see this

View attachment 28982

Note the MAC address of the Network Card is the same as the MAC address of the Linux Bridge vmbr0:

On a node which doesn't work then MAC address for the Network Card is the same but for the bridge it is different.

View attachment 28983
View attachment 28984
Note one ends in 33:88 and the other ends in 3a:2e

So to fix this you need to go to your router. (IMHO: I found it easier than trying to find where and what I was looking for in the linux system.)

On the router find your BIND IP TO MAC section and change the MAC from the one shown in the Network card section ( ends in 33:88) to the Bridge MAC address (ends in 3a:2e)

Migrate all the VM's to another node (if they are critical)
Reboot this node
Migrate the VM's back.

problem solved

Thanks Damon