Oh my, look at this wealth of information!
netstruggler jimjim1 thank you for your replies.
I usually access the NAS through the QNAP cloud (Windows 10). That is the
only way I can remotely access it. In my home network 192.168.0.27:443 (not sure about 443) usually works. The QNAP suggested alternative of
https://98.765.43.21:443 (the address is an example of course) has never worked. I first suspected a firewall issue, but lately I have come to suspect an incorrect port forwarding issue.
I do not have static IP, but I have DDNS through no-ip which has worked mostly. My static IP address doesn't change much, maybe once or twice a year, usually following a longer internet outage.
The ultimate aim of all this is to set up (s)ftp (using WinSCP), syncing two NAS on remote networks (QNAP has an app for this), with local streaming of movies and music.
remote access (ftp/sftp)------------> NAS1 <-------sync--------> NAS2 <------------ remote access (ftp/sftp)
.....................................................I...... ..................... ...........I
.....................................................I...... .................................I
..........................................local access....................... local access
..............................................(DLNA, ...............................(DLNA,
.............................................ftp etc.)............................... ftp etc.)
...............................................R-Pi.................................. QNAP
........................................123.456.78.90 .......................987.654.32.10
...........................................w/DDNS................................. w/DDNS
I have succeeded in setting up NAS 1. You might laugh at me but the system is basically a Raspberry Pi to which I connected 4 drives (HDD and thumb) and managed by OpenMediaVault 5* with DDNS. I usually connect to this setup via WinSCP (Windows) and AndFTP on my mobile. That was basically my Corona vacation project and what sparked my interest.
* Despite having set up port forwarding, I cannot remotely access OMV5 on the R-Pi. Grrrrr!
I was able to pull up the local IP ranges:
.......................................................(Drea m M. IP) .................. QNAP IP
.......................................................192.1 68.1.26..................192.168.0.27
WWW ----------> LiveBox -------------> Dream Machine -----------> QNAP NAS
........................192.168.1.10 - ...............192.168.0.6 -
........................192.168.1.150 ................192.168.0.254
...........................................................1 92.168.0.1/24
............................................................ ..(subnet mask)
* LiveBox shows the Dream Machine's IP of 192.168.1.26, and the Dream Machine shows the QNAP's IP of 192.168.0.27.
The complication as of two days ago: I cannot access my NAS through the QNAP cloud. I had asked the wife to turn the QNAP NAS off and on again, but that did not help. The NAS still performs update checks (I get those auto confirmation emails), but is not remotely accessible at the moment, and I won't be home for another two weeks.
I have a longer layover in a few days and I'll try
jimjim1 's setup and
netstruggler 's link.
awair to the best of my knowledge Orange LiveBox doesn't offer VPN, but the dream machine does. I guess that'll be another interesting adventure setting it up!
Thank you all for your interest and help!
P.S. Sorry for all those dots in my schematics, but space characters get ignored.