If using the UniFi Network Application, you can find manual firmware links in the Ubiquiti Community Releases 2. Update via Web Interface (GUI)
⚠️ : Firmware v1.255 is very old (circa 2010–2012). Modern Ubiquiti airOS devices run v6.x, v7.x, or v8.x. v1.255 lacks security patches, modern features, and may be incompatible with newer hardware. Upgrade Firmware Version 1.255 Ubnt -UPD- Download
: Right-click the "Download" button on the official site and select "Copy Link Address" if you plan to use the manual URL method. 2. Upgrade via Web Interface (Standard) This is the safest method for most users. Log in to your device's web management page (typically 192.168.1.1 192.168.1.20 Navigate to the section, click Select the file you downloaded and click Once the transfer is verified, click . The process usually takes 3–7 minutes If using the UniFi Network Application, you can
Before you start the upgrade process, make sure you: Upgrade via Web Interface (Standard) This is the
Do not download firmware from unofficial sources to avoid "cracked" or malicious software. Official Link: Ubiquiti Software Downloads page
: Official updates often add requested features, such as improved logging, VPN enhancements, or Teleport support. Potential "Cons" (Common Post-Update Issues) Software Downloads: releases/firmware - Ubiquiti
: This version number (1.255) is highly unusual for UniFi OS or airOS devices. It may refer to a very specific legacy device or a specialized "Lite" firmware designed to limit maximum VLAN counts to 255 for memory optimization.