# Invalid Host Header error

Host header checks are a security measure in production environments. However, some frameworks perform them also in dev mode and only accept `localhost` in the Host header. Since LocalCan sets the Host header to either your local domain or Public URL, you should consult your framework's documentation on how to disable host check in development, or add your domain to the allowed hosts.

Examples:

#### Angular

In Angular, you can disable host checking by modifying the `angular.json` file:

```json:angular.json
{
  ...
  "projects": {
    "your-project-name": {
      "architect": {
        "serve": {
          "options": {
            "disableHostCheck": true,
            ...
          }
        }
      }
    }
  }
}
```

or run your app with a flag:

```shell
ng serve --disable-host-check
```

#### Django (Python)

In Django, you can modify the `ALLOWED_HOSTS` in your `settings.py` file:

```python:settings.py
ALLOWED_HOSTS = ['myapp.local', 'localhost', '127.0.0.1', ...]
```

For other frameworks, please refer to their documentation.