Ubiquiti has consolidated its legacy tools under the support section of their new domain.
Step-by-step instructions:
Because Ubiquiti frequently updates their site structure, the most reliable direct path as of this writing is: ubnt discovery 251 download link
If you run v2.5.1 and see a blank screen, try these fixes: Ubiquiti has consolidated its legacy tools under the
If you are searching for the UBNT Discovery Tool version 2.5.1, you are likely a network administrator troubleshooting legacy equipment or working within an older operating system environment. ubnt discovery 251 download link
While Ubiquiti Networks has moved on to modern platforms like the UISP Mobile app and WiFiman, older versions of the Discovery Tool (specifically v2.5.1) remain a critical utility for discovering and provisioning legacy airMAX, airCube, and ISP devices on local networks.
Note on Safety: Ubiquiti has officially removed legacy desktop discovery tools from their main download page in favor of mobile apps. If you are downloading this file from a third-party repository, ensure you scan the file for malware before running it, as legacy software is often targeted for trojan injection.