Connecting Livebook to a node on a remote docker container

Hey, I’m trying to do the same thing without the ssh tunnel part.

So far I can connect a local iex session to the remote node (with Node.connect) but only using it’s IP, using it’s hostname won’t work for some reason (while a local iex session with --remsh app@example.com works).

And I can’t get working livebook locally with my remote node, I started it with the LIVEBOOK_NODE, LIVEBOOK_DISTRIBUTION and ERL_AFLAGS but no luck livebook won’t connect to the remote node.

Any idea what the problem might be? I found another topic which look like my issue but my mtu is already set at 1500 so no luck either here.