---
title: "Alternate steps 4. and 5. configure your proxy server"
slug: "dpo-oob-alternate-steps-4-and-5-configure-your-proxy-server"
updated: 2026-10-27T20:13:12Z
published: 2026-10-27T20:13:12Z
canonical: "docs.onespan.com/dpo-oob-alternate-steps-4-and-5-configure-your-proxy-server"
---

> ## 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.

# Alternate steps 4. and 5. configure your proxy server

If you've implemented a proxy server in front of the DigipassONE API Server which uses a different front-end URL (in the browser) for REST calls or a different proxy instead of the API Server, then you need to configure a regular expression so the DigipassONE App SDK can verify the endpoints. For more information, see [Implementing a Proxy Server](/dpoa/docs/s3suite94-web-considerations-for-integration-1#implementing-a-proxy-server) in the *Web Developer Guide*.

If your proxy server has specific rules for its URL, then you may need to adjust your API Server configuration. See [API Server properties](/dpoa/docs/s3suite94-api-server-properties-1) for the different settings you can use to further configure the API server.

Formerly known as Digipass S3.