Why I can't access remote Jupyter Notebook server?

Have you configured the jupyter_notebook_config.py file to allow external connections?

By default, Jupyter Notebook only accepts connections from localhost (eg, from the same computer that its running on). By modifying the NotebookApp.allow_origin option from the default ' ' to '*', you allow Jupyter to be accessed externally.

c.NotebookApp.allow_origin = '*' #allow all origins

You'll also need to change the IPs that the notebook will listen on:

c.NotebookApp.ip = '0.0.0.0' # listen on all IPs

Also see the details in a subsequent answer in this thread.

Documentation on the Jupyter Notebook config file.

I managed to get the access my local server by ip using the command shown below:

jupyter notebook --ip xx.xx.xx.xx --port 8888

replace the xx.xx.xx.xx by your local ip of the jupyter server.

James023 already stated the correct answer. Just formatting it

if you have not configured jupyter_notebook_config.py file already

Step1: generate the file by typing this line in console

jupyter notebook --generate-config

Step2: edit the values

gedit  /home/koushik/.jupyter/jupyter_notebook_config.py

( add the following two line anywhere because the default values are commented anyway)

c.NotebookApp.allow_origin = '*' #allow all origins

c.NotebookApp.ip = '0.0.0.0' # listen on all IPs

Step3: once you closed the gedit, in case your port is blocked

sudo ufw allow 8888 # enable your tcp:8888 port, which is ur default jupyter port

Step4: set a password

jupyter notebook password # it will prompt for password

Step5: start jupyter

jupyter notebook

and connect like http://xxx.xxx.xxx.xxx:8888/login?