{
  "port": 4200,
  "protocol": "tcp",
  "service": "Angular CLI dev server",
  "oneLiner": "The default port for `ng serve`, the Angular development server.",
  "whatItIs": "Angular CLI's serve builder defaults to port 4200, so any machine doing Angular frontend work has one. IANA assigns the 4200-4299 range to vrml-multi-use, which you will not encounter. A 4200 on a scan is a developer workstation or a container that shipped a dev build instead of a production bundle.",
  "exposure": {
    "verdict": "never",
    "note": "It is an unauthenticated dev server with a live-reload websocket and unminified sources — keep it on localhost."
  },
  "checkCommand": "curl -s http://localhost:4200/ | head -20",
  "links": [
    {
      "title": "Angular CLI — ng serve (port default 4200)",
      "url": "https://angular.dev/cli/serve",
      "kind": "official-docs"
    },
    {
      "title": "angular/angular-cli on GitHub",
      "url": "https://github.com/angular/angular-cli",
      "kind": "github"
    }
  ]
}