Or allow us to specify a custom port.

It looks like you can modify the default port by configuration.🤔 Can you try it?

https://js.electronforge.io/interfaces/_electron_forge_plugin_webpack.WebpackPluginConfig.html#loggerPort

module.exports = {
  //...
  plugins: [
    {
      name: '@electron-forge/plugin-webpack',
      config: {
+       loggerPort: 9001,
        mainConfig: './webpack.main.config.js',
        renderer: {
          config: './webpack.renderer.config.js',
          entryPoints: [{
            name: 'main_window',
            html: './src/renderer/index.html',
            js: './src/renderer/index.js',
            preload: {
              js: './src/preload.js'
            }
          }],
        }
      }
    }
  ]
  //...
}

Thanks! Indeed this was useful, for sure there was a way to configure it, but the sole fact of it being non-trivial made me create this issue. I suggest one of the following alternatives:

• Add the port-probing mechanism, check for availability of a port from 9000 to 9999, for example, and fail if none is available
• Add the line with the loggerPort: 9000, to the config generated by the npm init electron-app@latest my-app or yarn create electron-app my-app commands (or any other command that generates a project from a template). It would be redundant, for sure, since 9000 is a default value, but it would also be very convenient since changing the port would be trivial. I assume everyone will try first CTRL + F, and then 9000, and this time they'll find something, and be able to change it to make it work.

Thanks again!