UniFi Firewall Shadow Mode: High Availability Explained

Published at : 23 Dec 2025

https://lawrence.video/unifi

In this video, I dive into UniFi’s High Availability (HA) Firewall setup, also known as Shadow Mode.

As of Febuary 2025 it's supported for the Dream Machine Pro, Dream Machine Special Edition, Dream Machine Pro Max, and the Enterprise Fortress Gateway. Whether you're running a business network or building a robust homelab, this guide covers everything you need to configure HA and to maximize your network uptime.

*Additional Resources*
+ UniFi Shadow Mode Documentation: https://help.ui.com/hc/en-us/articles/19581768432535-UniFi-Gateway-Shadow-Mode-High-Availability

--

Connect With Us
---------------------------------------------------
+ Hire Us for a project: https://lawrencesystems.com/hire-us/
+ Toms' Twitter 🐦 https://twitter.com/TomLawrenceTech
+ Our Website https://www.lawrencesystems.com/
+ Our Forums https://forums.lawrencesystems.com/
+ Instagram https://www.instagram.com/lawrencesystems/
+ Facebook https://www.facebook.com/Lawrencesystems/
+ GitHub https://github.com/lawrencesystems/
+ Discord https://discord.gg/ZwTz3Mh

Lawrence Systems Shirts and Swag
---------------------------------------------------
►👕 https://lawrence.video/swag/


AFFILIATES & REFERRAL LINKS
---------------------------------------------------
Amazon Affiliate Store
🛒 https://www.amazon.com/shop/lawrencesystemspcpickup

UniFi Affiliate Link
🛒 https://lawrence.video/unifi-affiliate

All Of Our Affiliates help us out and can get you discounts!
🛒 https://lawrencesystems.com/partners-we-love/

Gear we use on Kit
🛒 https://kit.co/lawrencesystems

Use OfferCode LTSERVICES to get 10% off your order at
🛒 https://www.techsupplydirect.com?aff=2

Digital Ocean Offer Code
🛒 https://m.do.co/c/85de8d181725

HostiFi UniFi Cloud Hosting Service
🛒 https://hostifi.net/?via=lawrencesystems

Protect your privacy with a VPN from Private Internet Access
🛒 https://www.privateinternetaccess.com/pages/buy-vpn/LRNSYS

Patreon
💰 https://www.patreon.com/lawrencesystems

00:00 What UniFi Firewalls Support Shadow Mode?
01:19 How to Setup UniFi Shadow Mode?
04:20 How VRRP And Firewalls Sync
07:38 UniFi Fail over Process Explained