VPN connection from outside into the network about xipona HOT 4 CLOSED

This video suggests PiVPN but the problem is that it's probably not possible to set it up in a Docker container due to an initialization via a gui.

It might be possible to set up OpenVPN to accomplish this but further research is needed

OpenVPN in a Docker Container

DuckDNS is used to connect the pi's dynamic ip address to a domain.

from xipona.

Any error like
exec user process caused "exec format error"
is caused by the difference in the os architecture the Docker image was built on and the os architecture the image is run. A lot of pre-built Docker images are not runnable on the pi - but luckily there's a workaround: build the image yourself.
Often the DockerHub pages reference a Github repo where the Dockerfile and affiliated ressources are located.

However, I ran in other issues which I couldn't fix to this moment:

This and this article/Github-page suggest how to get WireGuard running but the former fails during the kernel build (I tried different versions because 4.17.1 apparently doesn't exist) because some header or config (depending on the selected version) is missing while the latter fails because it's missing "linux-headers-4.19.66-v7". It seems like there are headers missing for the pi's current kernel version and I wasn't able to retriev them via
apt-get install raspberrypi-kernel-headers
So WireGuard seems like it's no option at this point.

from xipona.

OpenVPN is running now and works ... if accessed internally.
I followed the instructions here.

For getting it running from outside of the network via the duckdns.org address, I'll have to open a port ... somewhere.

from xipona.

The router was missing port forwarding which is now configured.

Accessing the internal network from outside works now.

from xipona.