How to Add X-Forwarded-For heading and enable IIS logging

This article applies to the following products:

• IIS

Summary

Configure IIS to add the X-Forwarded-For header via request filtering, then enable custom IIS logging fields to capture client IPs, ensuring accurate logs behind load balancers or proxies.

Steps

• Navigate to IIS > Default Website

• Click on Logging 

  

• Click on Select Fields and Add Field

  

• Set the Field name and Source as: X-Forwarded-For

• Set the Source Type as: Request Header

  

• Click OK and then Click Apply

The IIS logs are located here C:\inetpub\logs\LogFiles\W3SVC1