Firmware 1.255 is not universal. Check your device label or log into the UI and look for “Model.” Common compatible candidates might include:
Do not deploy v1.255 in production — it’s insecure and unsupported. Use only for:
If you absolutely must run v1.255, isolate the device behind a firewall with no internet access, disable SSH/WAN admin, and use only as a Layer 2 bridge.
For any real-world use, upgrade to at least airOS v6.3.2 (last stable for XM) or v8.7.11 (XW).
To upgrade your Ubiquiti (UBNT) device to a specific firmware version like 1.255, follow these standardized procedures for manual updates. 1. Download the Firmware File
Before starting, ensure you have the correct .bin or .tar file for your specific hardware model (e.g., EdgeRouter, UniFi AP, or airMAX).
Official Downloads: Visit the Ubiquiti Software Downloads page. Search for Model:
Use the search bar to find your specific device model (e.g., " EdgeRouter Lite NanoStation M2 Upgrade Firmware Version 1.255 Ubnt -UPD- Download
Select Version: Locate version 1.255 (or the latest available stable release) and click Download.
Get URL (Optional): If you are updating via SSH, right-click the download button and select "Copy Link Address" to get the direct URL. 2. Manual Upgrade Methods Method A: Web GUI (Easiest) EdgeRouter - How to Upgrade the EdgeOS Firmware - UISP
Upgrading your Ubiquiti (UBNT) device to firmware version 1.255 ensures improved stability and security. While "1.255" often appears in network settings as a broadcast address (
), specific legacy or specialized Ubiquiti builds follow unique versioning. Amateur Radio Emergency Data Network 1. Locate the Correct Firmware
Before starting, you must find the exact firmware binary for your specific hardware model (e.g., EdgeRouter, UniFi AP, or airMAX). Visit the official Ubiquiti Downloads Search for your device model
(e.g., "UAP-AC-Lite" or "EdgeRouter X") to find compatible firmware releases.
If using the UniFi Network Application, you can find manual firmware links in the Ubiquiti Community Releases 2. Update via Web Interface (GUI) Firmware 1
The simplest way to upgrade is through the device's built-in system settings.
to your device via a web browser using its IP address (default is often Navigate to the section, click to select the file you downloaded. and wait for the device to flash and reboot. Do not power off the device during this process. ISP Supplies 3. Manual Upgrade via SSH
If the web interface is unavailable, use SSH to push the update directly. [OpenWrt Wiki] Ubiquiti UniFi AP and AP-LR
TO: Network Administration / IT Department
FROM: [Your Name/Team]
DATE: [Current Date]
SUBJECT: Firmware Upgrade Report – Ubiquiti Device to Version 1.255 (UPD-UBNT)
Log into your device via web browser (default IP: 192.168.1.20). Navigate to the System tab. Write down your current version (e.g., XM.v6.0.8). If you are already on a version greater than 1.2xx, this update may be a downgrade.
Assuming version 1.255 is legitimate for your specific hardware, what improvements might it bring? Based on release patterns from similar version jumps, here are plausible changes:
Instead of v1.255, go to the latest stable firmware for M-series: If you absolutely must run v1
| Device Series | Latest airOS | |---------------|---------------| | M2 / M5 (old) | v6.3.2 (final) | | M2 / M5 (newer) | v8.7.11 |
Download from:
https://dl.ui.com/firmwares/airOS/M/
Check your hardware revision first (e.g., XM vs XW) — v8.x requires XW.
To check:
cat /proc/cpuinfo | grep system type
# "Atheros AR9342" = XW, "AR7240" = XM (v6.x max)
The following steps were executed:
Observed Behavior During Upgrade:
Upon successful installation of Version 1.255, administrators must perform the following checks: