I am trying to use my RUT240 as VPN Server to connect to my home LAN from outside with my MacBook Pro with L2TP over IPSEC.
I did everything according to this example config: https://wiki.teltonika-networks.com/view/RUT240_L2TP_over_IPsec_(Windows_10)
I also have something similar running on a RUTX11, where it works perfectly. Only difference except the hardware: The RUTX11 is using the latest RUTOS, the RUT240 is using the "old" firmware (but still the latest: FW ver.: RUT2XX_R_00.01.14.4).
The RUT240 (and also the X11) are using a mobile connection only (LTE). I also tried exchanging the SIM cards to make sure it's not provider caused, but it makes no difference: The X11 works, the 240 not.
Any hints or ideas that could help me?