JupyterHub-AWS EC2 instance-This site can't be reached

[rk_jc]

AWS EC2 instance: /hvm-ssd/ubuntu-focal-20.04-amd64-server
Instance Type: C5 large

Tried installing JupyterHub two ways:

1. Install JupyterHub and JupyterLab from ground up
2. The Littlest Jupyter Hub

I have also forwarded the port 8000 to ip server in Putty.

For option 1 after following all the steps and when I run command:

sudo systemctl status jupyterhub.service

I get following message in terminal:

Hub API listening on 127.0.0.1:8081
JupyterHub is now running at8000

According to guide, I should be able to open the site.
But I get “This site can not be reached” error message (Google Chrome)
I tried to open it using:

https //{ip server>/8000
https //127.0.0.1/8000

I have also granted all access to port 8000 and 8081 for EC2 instance on AWS.
Any help in the right direction will be really helpful.

[1kastner]

The output of sudo systemctl status jupyterhub.service is quite informative - everything is up and running. Maybe you can ask for help in a forum that deals with Putty, SSH tunnels, and firewalls? From your information it looks like a networking issue.

[rk_jc]

Thanks @1kastner for the quick reply. You may be right - but it’s a rabbit hole and I am scared to go that way.
It says hub is listening on port 8081, and when I ran nmap it doesn’t show 8081 in the list.
So need to investigate that.
Happy new year.

[1kastner]

Can you share which processes are listening on which ports?

[rk_jc]

@1kastner, I was able to install hub using ground up approach, but then it gave trouble while spawning.
I then shifted to tljh and was able to install and run hub.
The problem might have been in my security configuration of EC2 instance. I added some custom IPV and enable echo request. That did the trick for both ground up and tljh approach.
Thanks for asking me the question - it led me investigate it further - but did not take the screenshot to answer back. Sorry.

[1kastner]

Great to hear that the issue is solved!