Nodejs server does not display pages on the port, what to do about it?

Question

Node.js

I welcome everyone. Essence of a question in the following: I start node.js the server, the 3000th port is listened. Everything is fine on the locale, the necessary pages like mysite.ru:3000/page are processed by the node. However, having launched the server on my VDS, the pages were no longer processed. The page is simply unavailable and that's it. What is it such can be, where in general to dig?

Answer 1

Understood. It was a matter of protocol. On the local server, the server was created under http, and on the server it was necessary under https.