---
title: "Configure access logs"
slug: "dpo-configure-access-logs"
updated: 2026-10-27T20:13:33Z
published: 2026-10-27T20:13:33Z
canonical: "docs.onespan.com/dpo-configure-access-logs"
---

> ## 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.

# Configure access logs

## Introduction

DigipassONE authentication software provides 2 access logs using the Log4j2 package. These contain details about REST API calls to the Servers including query parameters, headers, elapsed time, UTC time, and other details from the request and response payloads. Access logs are disabled by default. Enable access logs to trace activity in your data centers.

| **Component** | **Log File Directory** | **Log File** | **Configuration File** |
| --- | --- | --- | --- |
| Authentication Server | <TOMCAT_HOME>/logs | nnl-access.log | <TOMCAT_HOME>/conf/nnl/log4j2-nnl.xml |
| API Server | <TOMCAT_HOME>/logs | nnlgateway-access.log | <TOMCAT_HOME>/webapps/nnlgateway/WEB-INF/classes/log4j2.xml |

Enable access logging during Server installation by assigning the [two access log properties](/dpoa/docs/s3suite94-step-3-set-up-the-installation-properties-file-1#b-assign-log-properties) in the <NNL_HOME>/install/nnl-install.properties file.

Formerly Digipass S3 software.