Rsync or Partial File Updating over VPN?

[RadicalDad]

I have NAS boxes (Synology) in two separate locations and was thinking of using SFFS to sync the two boxes, both as a way of communication between the two locations and to implement offsite disaster backup. Yes, the NAS has the ability to do this natively with rsync (which I know little about), but the native NAS app isn't bidirectional and the error diagnostics aren't as good as what I'll get with SFFS.

There are two ways I can approach this and would like advice as to which might be better, more stable, more reliable - or even possible.

1) The NAS has a native VPN server. I could set that up and then use a PC in one of the locations to run SFFS with partial file updating to reduce Internet traffic. A PC on the other side will run Extreme Sync Remote Service against the local NAS to compute the MD5 checksums. (I assume this scheme will work - please advise if I'm missing something here.)

2) I could try the new V6 beta with rsync over SSH and process against the native rsync server in the NAS. There isn't much to set up on the NAS here - its either on or off. I know little about rsync so I have no idea what I'm talking about. As above, please advise whether this will even work.

Thanks for setting me in the right direction. Don't want to spend a lot of time going down a dead-end rabbit hole.

[superflexible]

Hello,

both methods are possible, but rsync support is very new and still being developed and tested. For example, the program can't delete files via rsync yet. On the other hand, rsync might be a little easier to set up initially. I guess it depends on if you want to be a beta tester or not.

If using the ExtremeSync Remote Service to generate the checksums, you may need to give it a log on user account so that it can access the NAS over the LAN.