Allow HTTPS traffic to Amazon EC2 instance

Question

Hello, I'm having issues allowing traffic through HTTPS to my Ubuntu EC2 instance, where I want to run an app that creates a server using Express.js. This instance already has a domain name defined with its corresponding SSL certificates installed. When I try to start the server, I encounter this issue, and I'm not sure how to resolve it.

screenshot

![screenshot](/media/postImages/original/IMTHU7bMk9TRinc1RSRKTcBw)
![screenshot](/media/postImages/original/IMKyX5DjNIRhmnxa3UX3fCow)

Answer

You cannot use your global IP or your public DNS name as your `hostname`, but you can set `hostname` to `0.0.0.0` to serve your app globally.

```js
const http = require("http");

const hostname = "0.0.0.0";
const port = 8000;

const server = http.createServer((req, res) => {
  res.writeHead(200, { "Content-Type": "text/plain" });
  res.end("Hello World
");
});

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});
```

Allow HTTPS traffic to Amazon EC2 instance

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