ftp://ftp.dlink.com/Multimedia/dns323/Firmware/dns323_firmware_107.zip
ftp://ftp.dlink.com/Multimedia/dns323/Apps/easy_search_utility_4400.zip
ftp://ftp.dlink.com/Multimedia/dns323/Firmware/dns323_release_notes.txt
Alternative link:
ftp://ftp.dlink.de/dns/dns-323/driver_software/DNS-323_fw_RevAll_107B01_20090327.zip (Easy Search 4.4.0 included)