FTP upload not working without internet

[Deg_314940176240776]

I have FTP upload set up to LAN server 10.10.10.2. My 3g internet is very unstable and can be down for weeks. Turns out, NVR does not upload anything to LAN FTP server when WAN is down.
Can anybody confirm that is the case?

Model RLN8-410-E
Hardware H3MB16
Firmware v2.0.0.274_20120701

[Reolink Fiona]

@deg_314940176240776
It will work in LAN. Can you try to test the FTP in LAN first?

[Crimp On_62210811129]

I agree with Fiona that FTP is based entirely on the server IP address. When the server is on the LAN, FTP will not attempt to access the internet.
(caveat: I have no NVR. My individual cameras FTP motion recordings directly to the LAN FTP server.)

On the cameras, there is an option in the FTP setup to "Test" the FTP settings. Took me several tries to get the FTP logon information/pa*sword/directory parameters correct.
Should be relatively simple to do a "Test" with a live internet connection and also without a live internet connection.