Contents

Introduction

Prerequisites

Requirements

Components Used

Problem

Solution

Introduction

This document describes how to resolve the "404: Page not found" error in the Cisco Umbrella Warn page.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on Cisco Umbrella.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.

Problem

The Umbrella Warn page is returning a "404: Page not found" error.

Solution

Check to see if you have added the Umbrella IP ranges from this article to the external domains list: Secure Web Gateway's IP List and Domains to Allow in Customer Firewall. If they have been added, remove them from the external domains list and try the warn page again. If problems persists, please contact Umbrella Support.