Contents

Introduction

Overview

Compatibility Details

Recommended Action

Introduction

This document describes the compatibility considerations between Umbrella Roaming Client and DNSMasq.

Overview

Umbrella Roaming Client and DNSMasq both use port 53 for DNS and compete for the same resources. These two services are incompatible with each other.

Compatibility Details

Umbrella Roaming Client functions as a DNS proxy server, listening on 127.0.0.1 (localhost) port 53. Any other service, such as DNSMasq, that attempts to listen on the same port creates a conflict. Running both services on the same system is not supported.

- Only one service can operate on port 53 at a time.

- If both DNSMasq and Umbrella Roaming Client are installed, only one can function, usually whichever service starts first.

Recommended Action

You must choose to use either the Umbrella Roaming Client or DNSMasq, but not both, to avoid DNS conflicts on port 53.