Not able to add any of my 3 proxmox nodes to PDM

AndyKosh

New Member
Nov 10, 2025
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Not able to add any of my 3 proxmox nodes (9.1.2) to PDM (1.0.0). Getting the alert api error (status = 400: client error (Connect)). Port 8006 is not blocked, verified DNS entries for all the 3 nodes. Any idea, if I've missed anything?
 
is the DNS working on the PDM machine? What if you check the result in the shell of the PDM with dig? dig HOSTNAME

Does a fallback to IPs working?
Can you open a connection to the PVE nodes from PDM? nc -z PVEHOST 8006 && echo "worked".
If you don't see "worked" printed, and if it takes some moments, chances are that there is still a problem connecting to port 8006.
 
I tried adding nodes by FQDN & IP. I ran the command that you shared using hostname and IP address, output is worked
 

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I tried curl -k https://[fqdn or IP]:8006 for all the 3 nodes with their IPs & FQDNs on PDM, no output.
 

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That indicates that you have a network issue. Possibly firewall related.
You can run the same command directly from the PVE and it will show you what the appropriate response should look like. You can also try running this command across the PVE hosts, this will indicate whether the issue is specific to PDM or to PVE.

Cheers


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All of my 3 proxmox nodes are running on non subscription. Could it also be the cause?
no, sub or no-sub doesn't make a difference regarding available features.
 
Yes, it was a network issue. Found that the proxmox nodes were in VLAN 56 & PDM was on VLAN 90. After putting PDM in VLAN 56, hosts were able to connect successfully with the PDM. Thanks for the assistance.