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Update, I’m using IP address “0.0.0.0” in the node app, and netstat shows ip and port number. Still no success =/
Update** <br>Answer: I was trying to set this up on a droplet created from the pre-made Ghost image by DO. Finally figured out that this image comes with some rules already applied to IPTABLES. That was the reason I couldn’t reach my node app on a random port number. Added a rule to IPTABLES, and everything is working as expected.