Changing the default port for iPython notebook server / Jupyter

Question

I am trying to run an ipython notebook / jupyter server on a machine behind a firewall. The only port which is open is port 80. So was wondering how I can change the default por

Answer 1

Something is already listening on 80, you cannot bind 2 servers to the same port. Use a proxy that listen to 80, and redirect to your other servers and IPython base on URL, or address. Also don't use 80, use 443, if you are running a public server it should be over TLS for security.

Note that for any low port number you might need to increase the process privileges to root, potentially using sudo.