Ionic serve launches browser to "Invalid Host header" only

Bug Report

Ionic Info

Ionic:

   ionic (Ionic CLI)          : 4.0.1 (/home/david/.nvm/versions/node/v9.11.2/lib/node_modules/ionic)
   Ionic Framework            : @ionic/angular 4.0.0-beta.0
   @angular-devkit/core       : 0.7.0-rc.3
   @angular-devkit/schematics : 0.7.0-rc.3
   @angular/cli               : 6.0.8
   @ionic/ng-toolkit          : 1.0.0
   @ionic/schematics-angular  : 1.0.1

System:

   NodeJS : v9.11.2 (/home/david/.nvm/versions/node/v9.11.2/bin/node)
   npm    : 5.6.0
   OS     : Linux 4.14

Describe the Bug

In a new Ionic v4 beta project when I simply run ionic serve it launches a browser but only displays the message “Invalid Host header” as the only page content.

Steps to Reproduce Steps to reproduce the behavior:

(Follow exact steps in docs for a new v4 beta project.)

1. npm install -g ionic
2. ionic start myApp tabs --type=angular
3. ionic serve
4. See error in browser

Related Code

N/A

Expected Behavior

That it launches the app content in the browser.

Additional Context

I’m on a Pixelbook so running inside a LXC container so this issue might be limited to containers.

Maybe a workaround would be to configure webpack to work with the Chrome OS Linux LXC container (aka Crostini) default hostname of penguin.linux.test?

[imhoffd]

Hello all (especially @DavidFrahm @eslindsey @philips @kevin-brotcke) 👋

I have implemented the --public-host option for the Ionic CLI which should resolve all issues here. This option provides a way for devs to specify which host the browser should use, regardless of which host the dev server is bound to.

Please help me test this PR by installing a test version of the Ionic CLI:

npm i -g @ionic/cli@6.2.0-testing.5

Couple things to note:

• --address is now named --host
• the default host is localhost, not 0.0.0.0
• use ionic serve --host=0.0.0.0 --public-host=<hostname> to test

Let me know what you think! 💙

[thielpeter]

I used:

ionic serve --port 8080 --address 0.0.0.0 -- --disableHostCheck true