# Configure the app

Configure the app for Oracle Opera

After you [install](https://docs.stripe.com/use-stripe-apps/oracle/opera/installation.md) the Stripe app for Oracle Opera, you can configure the settings to use the app with your Stripe Terminal integration.

## Configure the app parameters

Use Windows File Explorer to go to the installation path. Then, edit the `appsettings.json` file to configure the following app parameters. “Stanza” is the Oracle term for parameter categories.

| Stanza | Description |
| --- | --- |
| AllowedHosts | The list of IP addresses allowed to listen for the services in this app. |
| Listen | - **Host**: The IP address used to access the web interface.
- **Port**: The port used to access the web interface.
- **ServerCertificatePath**: The path to the certificate used to access the site securely. The default certificate is a self-signed certificate for the IP address 127.0.01.
- **ServerCertificatePassword**: The password used to access the certificate file. |
| Transactional | - **Host**: The IP address used by the app to access the middleware.
- **Port**: The port used by the app to access the web interface.
- **ServerCertificatePath**: The path to the certificate used to access the site securely. The default certificate is a self-signed certificate for the IP address 127.0.01.
- **ServerCertificatePassword**: The password used to access the certificate file. |
| Token | These settings apply to Opera installations that occur on-premises.
- **Host**: The IP address used to access the web interface.
- **Port**: The port used to access the web interface.
- **ServerCertificatePath**: The path to the certificate used to access the site securely. The default certificate is a self-signed certificate for the IP address 127.0.01.
- **ClientCertiticateAuth**: A value of `true` or `false`, with a `false` value signifying that `ClientCertificateAuth` isn’t enabled on TPS.
- **ClientCertificatePath**: The path to the certificate used to access the site securely. The default certificate is a self-signed certificate for the IP address 127.0.01.
- **ClientCertificatePassword**: The password used to access the certificate file.
- **ServerCertificatePath**: The path to the signing certificate used to sign the client certificate.
- **ServerCertificatePassword**: The password used to access the certificate file. |
| Serilog | These settings apply to the log level.
- **Default**: The default log level is `Debug`. You can change this setting to `Info`, `Warning`, `Debug`, or `Critical`.
- **Override**: Override the default log level for module-specific logging: `Microsoft`, `Microsoft.Hosting.Lifetime`, or `System.Net.Http.HttpClient`. |
| Using | Don’t change the values for these system modules that the middleware uses. |

## Verify the sample file

Verify that your `appsettings.json` file looks similar to the following sample:

```json
{
  "AllowedHosts": "*",
  "Listen": {
    "Dashboard": {
      "Host": "127.0.0.1",
      "Port": "8081",
      "ServerCertificatePath": "certificate.pfx",
      "ServerCertificatePassword": "1234"
    },
    "Transactional": {
      "Host": "127.0.0.1",
      "Port": "8999",
      "ServerCertificatePath": "certificate.pfx",
      "ServerCertificatePassword": "1234"
    },
    "Token": {
      "Host": "127.0.0.1",
      "Port": "8990",
      "ClientCertificateAuth": false,
      "ClientCertificatePath": "../data/sslcerts/cert.pfx",
      "ClientCertificatePassword": "1111",
      "ServerCertificatePath": "certificate.pfx",
      "ServerCertificatePassword": "1234"
    }
  },
  "Serilog": {
    "MinimumLevel": {
      "Default": "Debug",
      "Override": {
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Information",
        "System.Net.Http.HttpClient": "Warning"
      }
    },
    "Using": [
      "Serilog.Sinks.Console",
      "Serilog.Sinks.File"
    ]
  }
}
```

## Restart the Windows service

After you edit the `appsettings.json` file, restart the Windows service by doing the following:

1. Press the **Windows** key on your keyboard.
2. Type `services` to open the Services app.
3. Select **Services** in the left pane, and then go to **Stripe OPI App Service** in the right pane.
4. Click **Restart** to restart the service and allow you to [access the web interface](https://docs.stripe.com/use-stripe-apps/oracle/opera/web-interface.md).

## See also

- [Access the web interface](https://docs.stripe.com/use-stripe-apps/oracle/opera/web-interface.md)
- [Troubleshoot your installation](https://docs.stripe.com/use-stripe-apps/oracle/opera/troubleshooting.md)