RN102 to Raspberry Pi Rsync over SSH within LAN

Computers -

Home - Same LAN

RN102 - 2 x 4TB HDD Flexraid

OS 6.4.2

Raspberry Pi running latest Raspian - No additional storage

Offsite Server - WAN

Debian 8.4 based atom server running 24/7 1 x 1TB

Office - WAN / VPN possible

RN104 - 4 x 1TB HDD Flexraid

OS 6.4.2

Flow of data -

Offsite Server -> RN102, RN104

(In test scenario) Raspberry Pi -> RN102 (both within the same LAN)

Reasoning-

I want to incrementally update the home and backup versions from the offsite web hosting, which brings media files down to the RN102 and RN104 in turn, intially I thought the quickest way to create a one way backup would be bittorrent sync. However, files on the web host are constantly deleted which is deleting the data in the backups as well. There are a variety of media files which I would rather backup into the same folder, as in I don't want indiviually dated folders. Rsync seems to fit the bill for this one way sync that simply adds new media and makes no change to the backup folders. If there are any other suggestions on better ways I am game for them.

I have been trying for the last week or so to sort out a one way incremental sync between an offsite server running debian and the RN102 / RN104. I thought the easiest way to get a test setup would be to chuck raspian (lightweight Debian) on to the raspberry pi and get a feel for the speeds etc internally, speed is a key requirement and reason for changing to considering rsync. I have not been able to get the setup working at all always getting the 'unable to connect to host' error.

I have followed this guide - http://kb.netgear.com/app/answers/detail/a_id/29929/~/readynas-os-6%3A-setting-up-a-backup-job-with-rsync-over-ssh

I am really not sure what I am doing wrong, SSH and rsync is enabled on both the RN102 and the Raspberry Pi, I have added the SSH keys to the known_hosts on both units and I am able to SSH to both units from their respective consoles. I am unclear why there would be no route to host as I am able to connect between both, any guidance would be most appreciated.

The log is as below -

Backup Job Name: Test
Backup Job Type: Incremental
Protocol: rsync+ssh
Backup Source: [remote:rsync+ssh]/192.168.1.71:/home/
Backup Destination: [Documents]/Test
Backup Start Time: Tue Apr 26 2016  0:05:11
Backup Finish Time: Tue Apr 26 2016  0:07:22
Backup Status: Fail: failure during copy.

Failed to run rsync, return rc 65280 (255)
'rsync' command returns rc=65280

ssh: connect to host 192.168.1.71 port 22: No route to host
rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.1]



----------------------------------------
Backup Job Name: Test
Backup Job Type: Full
Protocol: rsync
Backup Source: [remote:rsync]/192.168.1.71::home/
Backup Destination: [Documents]/Test
Backup Start Time: Mon Apr 25 2016 13:57:02
Backup Finish Time: Mon Apr 25 2016 13:57:02
Backup Status: Fail: failure during copy.