OTD500 Firmware Downloads
This page contains firmware files for OTD500 devices. Look to the table below or the changelog to find download links.
Stable firmware - this version has been tested through both internal QA processes and large-scale user deployments. All known issues have been resolved based on user reports and testing feedback. Stable firmware is currently used as the default for updates and is also deployed in mass production. To upgrade firmware using WebUI, follow the instructions in OTD500 Firmware.
Latest firmware - this is the most recent firmware release, featuring the latest updates, features, and fixes. While it has passed internal testing, it has not yet undergone widespread deployment or user validation. It may still contain undiscovered issues. We recommend testing on a small number of devices before considering broader updates.
Note: packages for Package Manager are independent from firmware and can be downloaded in the Package Downloads page.
| File | Type | Release date | Size | MD5 | Links |
|---|---|---|---|---|---|
| OTD500_R_00.07.18.3_WEBUI.bin | Stable FW  |
2025.10.30 | 22 MB | 58d2ea7b0adccaf993cbf62bde6045b3 | Changelog API |
| OTD5_R_00.07.19.4_WEBUI.bin | Latest FW |
2025.12.05 | 22 MB | 71e0a16fe5ce88781795819e43a846af | Changelog API |
| OTD5_R_SDK_00.07.19.4.tar.gz | SDK | 2025.12.05 | 43 MB | 57cf672992480db67b6e33d20a535a10 |
FW checksums
Checksums for firmware files can be found here.
Changelog
OTD500_R_00.07.11.3 | 2024.12.17
- Fix
- Services
- Wireguard: fixed field validation after firmware upgrade
- Services
OTD500_R_00.07.11.2 | 2024.12.09
- Fix
- Services
- IPsec: fixed loading connections using AEAD algorithms
- IPsec: fixed connection status display
- IPsec: fixed Local source IP option
- IPsec: fixed issue with multiple global secrets of same type
- OpenVPN: fixed the certificate file selection issue in the server configuration
- Services
OTD500_R_00.07.11.1 | 2024.12.02
- Initial firmware release