proxmox-backup-manager acme account register behind proxy

kai.hofmann

New Member
Apr 17, 2026
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Hi, our Proxmox backup server needs a proxy server to access the wider internet.
We have configured the proxy in the web ui and in /etc/environments. Echo $http(s)_proxy returns the right settings.
Everything (apt, etc.) worked so far.
When we try to register a custom ACME account, however, backupmanager hangs on "Attempting to fetch Terms of Service from..." for a while after providing the directory URI, then throws an "Error: client error (Connect)".
When I run a curl on the same URI, I get a proper response from the CA's server.
The same procedure worked flawlessly with our PVE servers in the same network.
I am not entirely sure about what is going wrong, but it seems that proxmox-backup-manager does not honor the proxy settings for the ACME registration.
Has somebody seen this problem and can give me some advice?
 
Hello, thank you for the fast reply.
This is a bit unfortunate but at least I can stop searching for a solution for now.
We will try to find a workaround until this issue is solved.
Thanks again and best regards,
Kai
 
Hello, thank you for the fast reply.
This is a bit unfortunate but at least I can stop searching for a solution for now.
We will try to find a workaround until this issue is solved.
Thanks again and best regards,
Kai

Have you founded a workaround?

Maybe add it to the service?
Code:
systemctl edit proxmox-backup-proxy.service

[Service]
Environment="HTTP_PROXY=http://your-proxy-ip:port"
Environment="HTTPS_PROXY=http://your-proxy-ip:port"
Environment="NO_PROXY=localhost,127.0.0.1"
 
Hi,
thank you for the hint I tried this just now.
No luck there.
I also had our firewall team add a temporary exception for the server. With this the errormessage changed.
Apparently proxmox-backup-manager also won't work with our CA (harica).
I will try to put the Servers in another subnet without a proxy when they go productive and hope for the best.

Best regards
Kai
 
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