This article is focused on providing details about UNMS's generic key and how it works, as well as describing the fundamentals of the device registration process.
|NOTES & REQUIREMENTS:
This article applies to the following firmware versions:
- EdgeRouter: 1.9.7+
- EdgeSwitch: 1.7.3+
- uFiber OLT: 1.0.0+
- airMAX (AC): 8.4.1+
- airMAX (M): 6.1.3+
- airCube: 1.0.0+
Table of Contents
- How to Register a Device via UNMS Discovery
- How to Manually Register a Device via Device UI
- Generic Key Details
- Behind the Scenes: Device Registration in UNMS
- Related Articles
The purpose of the UNMS key is to provide a secure communication using AES encryption, while telling a device where to look for a UNMS server. The process of device registration using the generic UNMS key and the device specific UNMS key assures a secure communication between the user's devices and UNMS.
How to Register a Device via UNMS Discovery
1. Go to UNMS Discovery Manager.
2. Fill in the subnet or IP addresses of your devices.
3. Click the START button.
4. Fill in your credentials.
5. Click CONNECT button.
How to Manually Register a Device via Device UI
This is only necessary if UNMS is not on the same network as the devices being registered and they cannot be found with UNMS Discovery.
1. Open UNMS and go to the Devices section.
2. Click the ADD DEVICE button.
3. Copy the UNMS key (it is the same UNMS key for all devices).
4. Open your device's administration page.
5. Go to the System (EdgeRouter) or Services (airMAX) section.
6. Paste the UNMS key.
7. Enable the UNMS connection.
8. Save the device configuration.
9. Authorize your device in UNMS devices list.
In the following two sections we will discuss what happened in the background as you registered your devices with one of the two processes described above. Here is an example of UNMS key:
The UNMS key consists of several parts (shown in different colors above), each with their own purpose. In the table below we have split the UNMS key and stated the purpose of each section:
|wss://||WebSocket Secure connection protocol|
|your.domain.com||Hostname or IP of the server where UNMS runs|
|:443||Port for devices to access UNMS server|
|n9yU137QSwTzBXnF...9Sk0pC7sDKGnpbxiHRI9W||Advanced Encryption Standard key (AES key)|
Behind the Scenes: Device Registration in UNMS
So how does the UNMS key work? When a new instance of UNMS is installed, it creates its own UNMS key which is called The Generic UNMS Key. This key represents a pointer for any device being added to the system for the first time. When the generic UNMS key is entered into a device's settings, that device will try to connect to UNMS using the hostname / IP and the port part of that key (see third row of table above).
If the connection is successful, the AES key part of UNMS key is used for secure communication between the device and UNMS. When the connection is established for the first time then a new AES key is generated for the device. This new AES key replaces the original AES key in the generic UNMS key, creating The Device Specific UNMS Key.
Then the device specific UNMS key rewrites the generic UNMS key on the device and UNMS stores the device’s MAC address and AES key in PostgreSQL database. From that point forward, each time the device wants to communicate with UNMS, the AES key part of the device specific UNMS key is used and UNMS uses the AES key from the PostgreSQL database for decryption/encryption.