To access official firmware files, you generally need an active support contract. Visit arubanetworks.com.
This is the most straightforward method. aruba 505 firmware
The AP-505, 515, and 555 often share the same firmware image (often tagged as "Leo" or "Cyprus" in documentation). Ensure you are not flashing firmware meant for the 300 series or 600 series, as this will brick the device. To access official firmware files, you generally need