Connecting to a remote marimo instance interferes with local connection

[akshayka]

Describe the bug

1. On local machine, run marimo edit --port 2718 and start a notebook
2. On a remote machine, run marimo edit --headless --host 127.0.0.1 --port 2718
3. On local, connect to the marimo server in (2) on port 2020 using port forwarding, then open a notebook:

ssh -N -L 2720:127.0.0.1:2718 <REMOTE_USER>@<REMOTE_HOST>

In my repro, this was with the gcloud CLI:

gcloud compute ssh <INSTANCE> --zone=<ZONE> --tunnel-through-iap -- -N -L 2720:127.0.0.1:2718

The remote notebook can be interacted with fine. But the locally running notebook editor is interrupted by a "Sign in" alert. If you sign in with the token as username and password, then the notebook that's running remotely gets interrupted by a "Sign in alert."

Will you submit a PR?

• [ ] Yes

Environment

marimo 0.16.5 on both machines.

Replace this line with the output of marimo env. Leave the backticks in place.

Code to reproduce

No response

[dmadisetti]

Although we shouldn't put this on the user, does the following work?

marimo edit --headless --host 127.0.0.1 --port 2718 --proxy=http://127.0.0.1:2720

[akshayka]

Yeah I think it will work, I was just looking into that. In the meantime, we can change our docs to recommend a port other than 2718 on remote (eg, 3718)