Update internal signed SSL certificate on Proxmox VE node

rajeshkahlon

New Member
Nov 7, 2025
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I have internal SSL signed certificate which is issued by internal CA and need to be applied to one of the Proxmox VE server.

When i apply the certificate as below
node name > system > certificates
Upload custom certificates .

I have uploaded the private key and certificate, then also i am getting the error "Not secure".
I have also tried uploading private key and certificate chains and still getting the error Not secure.

What could be the issue.
 
Last edited:
You have to install your CA-Certificate from your chain into your client too. On Windows there should be some certmanagement, and on Linux you can place your CA to "/usr/local/share/ca-certificates" and execute update-ca-certificates. I recommend storing the CA on the Proxmox node there as well.
You can also import the CA manually in the web browser you are using.