u25 Appliance

The Untangle u25 NG Firewall Appliance is the smallest appliance Untangle offers. The u25 packs all the same great features you’ve come to rely on from Untangle’s NG Firewall software including network security, traffic filtering & monitoring, bandwidth optimization, VPN & captive portal when you add Complete package, making it the perfect solution for organizations looking for big features at a small price.


The u25 is perfect for small business, branch or home office environments with 10-25 users, light traffic load, and a small number of apps enabled. At less than 5” square, the u25 has the smallest footprint of any network security appliance available today. If you are not sure which appliance is best for you, contact us today.


Appliances ship with the NG Firewall platform installed, including all the free apps and a 14-day free trial of all the paid apps. Add a subscription to individual apps or Complete package for a full solution. You can choose a Complete package subscription based on the number of devices protected or an unlimited subscription that is tied to your appliance hardware. Unlimited subscriptions are only transferrable to like Untangle appliances.


For qualifying not-for-profit institutions, NGOs, private schools and religious organizations, we recommend Nonprofit Complete. This discounted package includes the same features as NG Firewall Complete.


*Shipping outside the U.S.? See available destinations.

Get the u25

The u25 is ideal for small business and home office environments with 10 to 25 users.

Starting at $399.00!

*Images are not to scale.

*Images are not to scale.


*Images are not to scale.


*Images are not to scale.


  • Tiny form factor.

  • Plug-and-play setup makes deployment easy for even less technical users.

  • Includes one year hardware warranty; extended warranty available.

  • Add a software subscription. Unlimited Complete for Appliances subscriptions are tied to the hardware and are only transferrable to like Untangle hardware.

  • Untangle Live Support (on the hardware or software) must be purchased separately as either standalone Live Support subscription or as part of Complete package.

  • During the first 15 days after receipt of your appliance, you may request a performance upgrade to the next larger appliance. If approved, you will be charged a restocking fee of $150 or 10% of the purchase price, whichever is greater, plus the difference in price between the appliances.

  • Please see our Return Policy and Warranty.

Tech Notes

  • Recommended for 10-25 users

  • Intel Atom® dual core processor

  • 2GB RAM

  • 3 x 1 gigabit ethernet ports

  • 32 GB mSATA SSD

  • 2 USB ports

  • HDMI port

  • Ships with power adapter, power cord, and ethernet cable

  • Dimensions: 4.9″ (W) x 4.7″ (D) x 0.76″ (H)

  • Signature black case with Untangle green logo and color-coded external/internal ethernet ports.

Setup Guide

Version: 14.1
Size: ~330KB
Format: PDF