Not working in VirtualBox

[JWo1F]

When I try to open localhost:3000 (on host machine) I see "ERR_CONNECTION_RESET" or "ERR_CONNECTION_ABORTED".

How to reproduce:

1. Install virtualbox (5.0.26)
2. Install ubuntu 16.04
3. Configure port-forwarding screenshot
4. Install node (6.3.1) and npm (3.10.3)
5. Install create-react-app and run create-react-app my-app
6. Start it.
7. Open http://localhost:3000 at host machine.

P.S: when I use "curl localhost:3000" on a guest machine all is okay. It's very strange.

[mxstbr]

Is this something we can fix from our side?

[JWo1F]

@mxstbr Yes, it was a typo (I fixed it).

I don't know, but if I create a file like this:

var http = require("http");

http.createServer(function(request, response) {
  response.writeHead(200, {"Content-Type": "text/plain"});
  response.write("Hello World");
  response.end();
}).listen(3000);

then start it and all is okay.

---

UPDATE: I think the problem is here: https://github.com/facebookincubator/create-react-app/blob/master/scripts/start.js#L150

When I remove 'localhost' all is okay.

[mxstbr]

Awesome, that's already very helpful @JWo1F!

WebpackDevServer uses http under the hood. Digging into https documentation this what it says about the hostname:

If the hostname is omitted, the server will accept connections on any IPv6 address (::) when IPv6 is available, or any IPv4 address (0.0.0.0) otherwise.

Which (I think) means that it's safe to remove that 'locahost' by default! Would you mind submitting a PR for that?

[JWo1F]

@mxstbr okay, please wait for PR :)

[gaearon]

Thanks!

[gaearon]

This should be fixed in 0.2.0 alpha. Can I ask you to try it and confirm? Here's how: #190