I'm bumping up this thread because I seem to be having the same problems as others here and it's one of the most popular results in a Google search.
My situation is, I have a DNS-323 (on the West Coast) and my Dad has a DNS-343 (on the East Coast). We want to sync/mirror our boxes each way, but (1) it needs to be secure across the Internet, (2) since we have hundreds of GBs of data it needs to be an incremental backup, not a full backup, and (3) it would be great if it could be automated/scheduled like once a week.
We all know that the 323 does not have Remote Backup functionality which is disappointing since the 343, 320, and 325 all do. Hopefully they're working on a new firmware to include this, or is this device at end of life??
Since new firmware isn't likely coming, now I'm thinking I should just replace my 323 with a 343 and then set up Remote Backup on each device to sync (manually, unfortunately, even though the 320 and 325 can be scheduled). What I want to know is, can the 343 do a Remote Backup to a remote NAS across the Internet, or does it only work locally (i.e., 192.168.x.x)? I called tech support and they said it only works locally, but this thread makes me think they were wrong.
Lastly, does anyone have any other recommendations to accomplish the same goal? VPN switches (like the NETGEAR FVS318) and just run folder sync software on an always-running computer?