How I can run a coder-server instance and test a express.js app in the same droplet?

Posted October 25, 2019 2.9k views
Node.jsDevelopmentInitial Server Setup

Hi, I’ve deployed a coder-server instance in a droplet, this is in my opinion the best way to have an cloud-based dev environment cause we can run VSCode on the web, everything ok whit coder-server.

My problem comes when I try to run a sample-app whit node and express, the app runs on port 3000 ok apparently, but seems that the droplet doesn’t have open that port and in consequence the browser can’t reach the express.js server.

Can somebody please help me to solve this situation?


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As the coder-server image from the marketplace uses Ubuntu, you could try opening port 3000 through the default Ubuntu firewall. First check if the firewall is active:

sudo ufw status

If the firewall is active, then you can open the port with:

sudo ufw allow 3000

For more information, you could take a look at this article here:

Hope that this helps!

by Mitchell Anicas
by Erika Heidi
UFW (uncomplicated firewall) is a firewall configuration tool that runs on top of `iptables`, included by default within Ubuntu distributions. It provides a streamlined interface for configuring common firewall use cases via the command line. This cheat sheet-style guide provides a quick reference to common UFW use cases and commands, including examples of how to allow and block services by port, network interface, and source IP address.