Below are legitimate sources as of 2024. Because Huawei does not host public updates, these links point to official ISP support portals and community archives with checksums.
Official firmware updates for the DG8245W2 are primarily distributed through the manufacturer and internet service providers (ISPs) rather than public download links: dg8245w2 firmware update link
Ensure the firmware matches your region. Installing firmware meant for a different country can disable your local Wi-Fi frequencies. Below are legitimate sources as of 2024