First of all, I have a device with official openwrt 18.06.2 firmware that works with xl2tpd.
The problem is when I'm using my custom firmware and the image builder it generates. This is the script that I use to generate it. Looks like my firmware cannot make it work xl2tpd and I don't find the reason.
I explored here for a while https://gitlab.com/guifi-exo/temba/issues/88 but I don't know how to continue.
Tools for debugging this issue are highly appreciated
EDIT: I started thinking was my custom firmware. I see that affects too nano-loco-xw ar711 18.06.4, I will continue testing
Thanks for your time,