The UBNT Discovery Tool v2.5.1 operates best on . Newer versions of Java will cause runtime initialization errors.
This error occurs if the terminal path does not match the file location, or if Windows file permissions restrict access. Always run the command prompt as an Administrator, and ensure your terminal working directory matches the exact folder containing ubnt-discovery-v2.5.1.jar . Fixing the "No Devices Found" Bug
The most common reason the discovery tool fails to launch is an incorrect Java version or missing environment variables. 1. Install Java 8 Run the downloaded Java 8 installer. Follow the on-screen prompts to complete the installation. ubnt discovery tool v2.5.1 and java on windows 10
Locate your Java executable ( javaw.exe ), usually found in C:\Program Files\Java\jre1.8.0_XXX\bin (or equivalent directory). Right-click javaw.exe and select .
Displays IP addresses of devices, even if they are outside your current subnet. Displays MAC Addresses: Essential for identification. The UBNT Discovery Tool v2
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Network administrators still rely on this specific .jar utility to scan local layers, locate airMAX or UniFi hardware, and perform crucial Layer-3 adoptions across mismatched subnets. Always run the command prompt as an Administrator,
Open the Control Panel and navigate to > Windows Defender Firewall . Click Advanced settings on the left sidebar.
The tool sends a UDP broadcast to port 10001 across your local network interface. Ubiquiti devices listening on this port reply with their IP addresses, MAC addresses, firmware versions, and uptime.
Navigate to the official Oracle Java Archive or the Adoptium Eclipse Temurin archive.