'ionic serve' fails on AWS EC2 RHEL8; possible security group issue

Ionic Framework
1

  1. Symptom: Command ‘ionic serve’ fails on AWS EC2 instance with RHEL 8. The browser says the connection is refused.

  2. Message:

> ng run app:serve --host=localhost --port=8100
[ng] ℹ ｢wds｣: Project is running at http://localhost:8100/webpack-dev-server/
[ng] ℹ ｢wds｣: webpack output is served from /
[ng] ℹ ｢wds｣: 404s will fallback to //index.html

Additionally, the same message comes out when I successfully ran the same command on Win 10; but there were some more like below:

[ng] chunk {common} common.js, common.js.map (common) 22.9 kB  [rendered]
[ng] chunk {core-js-js} core-js-js.js, core-js-js.js.map (core-js-js) 77.9 kB  [rendered]
[ng] chunk {css-shim-3ea8955c-3ea8955c-js} css-shim-3ea8955c-3ea8955c-js.js, css-shim-3ea8955c-3ea8955c-js.js.map (css-shim-3ea8955c-3ea8955c-js) 20.7 kB  [rendered]
...
  1. IONIC info:
   Ionic CLI                     : 5.2.5 (/usr/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.7.1
   @angular-devkit/build-angular : 0.801.3
   @angular-devkit/schematics    : 8.1.3
   @angular/cli                  : 8.1.3
   @ionic/angular-toolkit        : 2.0.0

Utility:

   cordova-res : not installed
   native-run  : not installed

System:

   NodeJS : v10.14.1 (/usr/bin/node)
   npm    : 6.4.1
   OS     : Linux 4.18
  1. Security group on AWS:
    Inbound: HTTP 80 and SSH 20 to my computer IP and TCP 8100 to all IPs.
    Outbound: HTTP 80 and TCP 8100 to all IPs.

Does anyone have an idea to check out what make the problem? Any comment will be appreciated.

2

In RDP Windows usually passes these errors, enters the rdp and enters the firewall and opens those ports from the firewall as well and that should solve the problem.

Good luck :smiley:

3

This maybe help…

Delete this two folders in your project… Theses are created will start the app…

platforms end www

Sometimes the error is solved!