z4 Appliance

The z4 is ideal for smaller networks, branch offices or retail locations that need a cost-effective network security solution that just works, right out of the box. This appliance performs well under heavy workloads like content filtering, intrusion prevention and VPN encryption, ensuring these smaller networks stay up and running with no hiccups. This quiet desktop appliance takes up minimal space and is recommended for networks with 10-50 users.
Appliances ship with the NG Firewall software platform pre-installed, including all the free apps and a 14-day trial of all the paid apps. Easily add a subscription to the Complete package for a comprehensive network security solution.

This appliance is also available as Hardware as a Service. Gain all the benefits of using this appliance to protect your network for a low monthly price. Learn More.
Not sure which appliance is best for you? Contact us today.
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Get the z4

The z4 is ideal for small business environments with 10 to 50 users.

Starting at $14.00 a month or purchase for $299.00!


Tech Specs

Recommended Users10 – 50
Processor Intel Celeron Quad Core
Storage32 GB mSATA SSD
Interfaces4x GbE
USB Ports4
Built-in LCDNo
Dimensions (w x d x h)6.1″ x 5″ x 1.4″ (156 x 127 x 37mm)
Unit Weight (lbs)2
Shipping Weight (lbs)4
Form FactorFanless Desktop
Firewall Throughput950 Mbps
NGFW Throughput*500 Mbps
Operating Temperature32° – 122°F (0° – 50°C)
Power Supply12V3A Adapter


* NGFW throughput is measured with Application Control, IPS, Web Filter, Virus Blocker and Reports.

Ships with power adapter and cable, VESA mounting brackets and screws, and rubber feet.


  • Cost-effective, desktop, network security appliance saves energy and space.

  • Get zero touch deployment through Command Center for easy license provisioning and remote configuration.

  • Includes one year hardware warranty.

  • Add a software subscription to meet your needs. 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 a 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.