Hi folks,

I'm thinking of writing a Jupyter server extension to provide an endpoint 
that another service in our ecosystem would call.

In our environment we're proxying all HTTP traffic between the user and the 
notebook, so we could plausibly prevent the user hitting our new endpoint 
if we wanted.

I see from the Jupyter server API that users can access and update the 
Jupyter configuration. This leads me to a few questions:

1. Does this extend to editing NotebookApp.nbserver_extensions, i.e. 
editing the list of installed extensions? Would users therefore be able to 
disable our server extension, or worse, replace it with one of their own?

2. What would users miss out on if we blocked access to the /config 
endpoints?

3. Aside from hitting /config, are there other ways that users can mess 
with the server environment? Should we, as administrators of a Jupyter 
server, consider the entire server and notebook environment open to 
modification by users -- or is their power to tinker limited in some way?

Thanks,
-Hussein

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