Firmware Link - http://billion.uk.com/firmware/89xx/8900ax-2400/Zcomax8900AX2400_2.52.d48.afw  *(use Google Chrome or Firefox web browser for download)

FW Release Notes :

1. “Fixed DNS-O-Matic dynamic DNS with “ssl connect error” issue”.
2. “Fixed Sky VDSL Option 61 WAN delay when DHCP lease is renewed” (causes delay/lag every hour).
3. “Users can now generate random CA on OpenVPN server”.
4. “Added new OpenVPN HMAC Authentication for more security support for SHA256, SHA384, SHA512”.