---
title: "Optional configurations"
slug: "dpo-optional-configurations"
updated: 2026-10-27T20:13:21Z
published: 2026-10-27T20:13:21Z
canonical: "docs.onespan.com/dpo-optional-configurations"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.onespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Optional configurations

By default, when DigipassONE Software is installed, the IP Address and EMV 3DS plugins are enabled. The IP Address Extractor plugin sends the IP Address to the Authentication Server so it can be used in Adaptive Rules. The EMV 3DS plugin returns EMV 3DS data to your client apps. If you deactivate them and want to reactivate them, refer to:

- [Sending the IP Address Signal](/dpoa/docs/s3suite94-nok-nok-authentication-api-1#ip-address-extractor-plugin)
- [Returning EMV 3DS Data](/dpoa/docs/s3suite94-nok-nok-authentication-api-1#emv-3ds-generator-plugin)

DigipassONE supports integration with different Federation Servers so they can support FIDO functionality and Adaptive Authentication and Adaptive Registration features. Refer to [Integrating with a Federation Server](/dpoa/docs/s3suite94-nok-nok-utility-apps-1).

The DigipassONE diagnostic logs are useful tools for debugging issues. Refer to [Configuring Diagnostic Logging](/dpoa/docs/s3suite94-configure-diagnostic-logs-1) to control the logging level and file size.

You can optionally configure TLS authentication or mutual TLS authentication between the API Server and the Authentication Server by using the instructions in [TLS Configuration](/dpoa/docs/s3suite94-tls-configuration-1). That page also includes instructions for configuring mutual TLS authentication between a proxy server and the API Server.

Formerly known as Digipass S3.