Alt-F provides a free alternative firmware for the DLINK DNS-320/320L/321/323/325.
Alt-F has Samba and NFS; supports ext2/3/4, VFAT, NTFS and ISO9660 filesystems; RAID 0, 1, 5 (with external USB disk) and JBOD; supports 2/3/4TB disks; rsync, ftp, sftp, ftps, ssh, lpd, DNS and DHCP servers, DDNS, fan and leds control, clean power up and down... and more.
Alt-F also has a set of comprehensive administering web pages, you don't need to use the command line to configure it.
Besides the built-in software, Alt-F also supports additional packages on disk, including ffp packages, that you can install, update and uninstall using the administering web pages
Main Code site: http://code.google.com/p/alt-f
Discussion Forum: http://groups.google.com/group/alt-f
Don't listen to what "regwergrgwerg" said because this is one of the best things that could happen to my D-Link 320L. The original firmware didn't do half of what the Alt-F firmware can do. If you want your D-Link to do what you want it to do, including adding on a whole raft of programs to enhance it's functionality, then you need to give Alt-F a try. Just one word of caution that "regwergrgwerg" seems to have forgotten: BACK UP YOUR DATA BEFORE YOU DO ANYTHING TO YOUR NAS. Even though the Alt-F software has never corrupted any of my data through multiple flashings and it always warned me when I did anything with the discs to BACK UP YOUR DATA. So take the leap and turn your outdated, or in my case brand new, D-Link into the powerhouse that D-Link never thought you could have. João Cardoso is doing such a great job that D-Link should hire him! Gostaria muito de comprar-lhe uma cerveja , se eu nunca tornam a Portugal!
Great alternative for the aging DLink if something other than the defaults are needed. I have this on two 323's. Been using it for several years and iterations. Does require some understanding and thought as it is capable of a lot (i.e. read and understand the documentation).
I don't usually rate beta's but I rate ALT F firmware 5 stars across the board. Compared to D-link's final firmware and the lack of fixes and support for some time before they announced end of life for this product, ALT F is an amazing reverse engineering feat that creates a lean mean NAS Machine. Enabling large drive support (>2TB) and package support like you won't believe (180+ packages listed) plus fun plug support for even more packages, ALT F breathes new life into this aging NAS hardware and squeezes out every ounce of performance it has to give. Compared to the OEM's firmware, the list of improvements and features you get by switching to ALT F is too extensive to list here (and everything in ALT F actually works unlike the OEM's). Rest assured, ALT F will not automatically format your hard drives. Formatting requires your affirmative action. If you do find your self in a situation where you're unsure, direct support from the developer himself is readily available in the ALT F forum on google groups. It's the excellent support that makes this a beta that's a safe bet and a big step up for anyone with this kind of hardware.
I've just replaced the D-Link firmware on my DNS-320L and fun_plug with Alt-F. It's the best, lots more features and customization options. I'm actually seeing much higher performance accessing the NAS shares from Windows. Folders snap open and file copies are much much faster than with the D-Link firmware!
The Alt-F firmware is a brilliant piece of firmware that brought my old CH3SNAS back to life. With up to date packages which you can install through the web-interface, I don't need to install fun_plug or optware anymore to make the NAS do what I want. Also the firmware add loads of extra functionality in regard to the basic Conceptronic and Dlink firmwares. Support on the firmware is great, Joao is quick with his replies and supplies fixes when needed. All in all a wonderful piece of firmware with great support!