Series Type: UniFi Dream Machine
Website Link:
Model: UDM
Type: Home or Small Business router with integrated AP

Description: UniFi Dream Machine (UDM) is the easiest way to introduce UniFi to homes and businesses. The UDM includes everything you need for a small-scale wired or Wi-Fi network. It's easy to use and still offers all the benefits of UniFi for homes and businesses.

  • High‐Performance Dual Band 802.11ac 4x4 Wave 2 AP
  • Managed 4-Port Gigabit Switch
  • Advanced Security Gateway with IDS/IPS and DPI
  • UniFi Network Controller with Intuitive User Interface
  • Scalable Through Additional UniFi Devices Connected to LAN
  • Powered by Fast 1.7 GHz Quad-Core Processor


  • UDM appliances have built in UniFi controllers and cannot be adopted by external controllers.
  • Multiple sites are no longer supported on UDM platforms.
Dimensions Ø 110 x 184.2 mm (Ø 4.33 x 7.25")
Weight 1.05 kg (2.32 lb)
Networking Interfaces (4) LAN 10/100/1000 RJ45 Ports
(1) WAN 10/100/1000 RJ45 Port
Buttons Reset
IDS/IPS Throughput 850 Mbps
Processor Arm Cortex-A57 Quad-Core at 1.7 GHz
System Memory 2 GB DDR RAM
On-Board Flash Storage 16 GB
Maximum Power Consumption 26W
Supported Voltage Range 100 - 240VAC
Power Method AC Power Cord
Power Supply Internal AC/DC Power Adapter (24V, 0.6A, 100 - 240VAC)
Power Save Supported
Beamforming Supported
TX Power*
2.4 GHz
5 GHz

23 dBm
26 dBm
Antenna (1) Dual-Band, Quad-Polarity Antenna
Antenna Gain
2.4 GHz
5 GHz

3 dBi
4.5 dBi
Wi-Fi Standards 802.11 a/b/g/n/ac/ac-wave2
Wireless Security WEP, WPA-PSK, WPA-Enterprise (WPA/WPA2, TKIP/AES), 802.11w/PMF
BSSID Up to 8 per Radio
Operating Temperature -10 to 45° C (14 to 113° F)
Operating Humidity 5 to 95% Noncondensing
Certifications CE, FCC, IC

* Including antenna gain. Maximum TX power level may be limited by user's country-specific regulations.

High RAM usage, or kswapd using too much CPU This is likely due to Java and/or Mongod using too much memory

  • You can reboot the entire UDMP , or
  • unifi-os restart which will restart the container running the controllers
  • unifi-os shell and etc/init.d/unifi restart then to restart the controller directly.

Log file locations are located in the following places

  • /var/log/messages
  • /mnt/data/log
  • Additionally the executable oopsdump can be run to retrieve log files.
    • You can also execute the following command to TAR all logs that might be helpful for Ubiquiti - tar -czvf /mnt/data/logs.tar.gz /mnt/data/log/*

SSH information

  • Username = root
  • Password = Your UI account password used when you setup the device.
  • NOTE: Changing your UI SSO password will update for authentication to the controller, but will NOT change the device SSH credentials. This means that it will continue to be the password you used when setting up the device.

This image can be uploaded to to make changes

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /home/nevyxvrt/ on line 446

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /home/nevyxvrt/ on line 102