Problem with setting up a VPN tunnel from on premises machine to Cloudron in Cloud

[arnej]

Hi, we are experiencing a strange issue when attempting to set up a Wireguard tunnel from an on premises workstation to the Cloudron Server which is hosted on Hetzner.

After starting the VPN connection on the local server, the connection does not get established. Apparently the Cloudron side is not responding.

The VPN configuration is a standard Wireguard one. We tested the setup with a 2nd machine on Hetzner that was just running a standard Ubuntu OS. With that VM, our local machine was able to establish a connection.

We double-checked both the Firewall rules on Hetzner as well as our own ones. They were fine.

Do you have any idea why that may be?

[james]

Hello @arnej

@arnej said in Problem with setting up a VPN tunnel from on premises machine to Cloudron in Cloud:

With that VM, our local machine was able to establish a connection.

This sentence confuses me a little.
A You did set up a VM on Hetzner with a Wireguard server and connected your on premise computer with that server
B You did connect a Hetzner VM to the Cloudron Wireguard

@arnej said in Problem with setting up a VPN tunnel from on premises machine to Cloudron in Cloud:

Do you have any idea why that may be?

Could this maybe be an issue with IPv6 and IPv4?
Can you share some insights if you use IPv6 local and in Cloudron?