This is only an idea, I’m not sure if it works.
Make sure you can access your Teddycloud.
If this is possible, then make a hotspot.
Make sure that your Toniebox connects with your hotspot. Now the Toniebox is connected to your hotspot, which has access to the Teddycloud. Have you tried to do it like this?
I created a win11 hotspot after I established the vpn connection and tried to connect the toniebox but it failed. I gave up after a couple of minutes because I didnt have much more time but I will try again as soon as I’m not home again with the toniebox.
Thanks for your ideas.It seems to be acomplex topic but I’m surprised that I’m almost the only one trying to get my Toniebox connected while not being at home.
I am interested in this topic, too and pondered also about trying to use a vpn.
I tried it, simply by setting up an OpenVPN and tried reaching the teddycloud while being connected from my phone. That did not work.
I learned that, because I use a Docker with macVLan - that the host doesn’t know the ip from the teddycloud docker and thats why you cannot connect via a VPN connection to the host (same device as I use a Synology)
I found a video related to this problem and want to try the solution presented there: https://www.youtube.com/watch?v=jCPIUDpqcgw&t=997s
(tldw: short script checking if docker is up, bridgeing macvlan to host)