I have added now the line "tun-mtu 1360" or "tun-mtu 1380". Also I have updated the flush connections as suggested above. So far, it did not work: we are not able to access the device via VPN.
As the router is remote and we can't reach it physically very easy at the moment, before doing the 'experiment' of switching LTE as main WAN, I would like to ask the following question regarding failover, as the manual is not very well written in this area (it good to list all properties etc but does not explain business):
1. Assuming in Network >> Failover, we have 2 entries with the following order:
- wan (type wired, Status online, activated ON)
- mob1s1a1 (type mobile, status online, activated ON)
2. Further below within the same screen, there is the "Rules section", and there is only one entry "default_rule" and the column "use policy" indicates "default(failover)". If you click on Edit, the new modal windows "Rule configuration", in second section "POLICY", under mode "Failover", the member used is currently selected "wan" and next line/entry 'mob1s1a1".
My question: What happens if I select here instead the following order "mob1s1a1" and 2nd line/entry "wan".
And the same time in previous interface main screen (Network >> Failover), as described above, we will have the entry "wan" appears first and "mob1s1a1" is second.
What will be the behaviour?
Thanks in advance.
PS: (attached screenshot of the screen Network >> Failover)