Yes, the WG3526 is the only gateway for the USG. I'll try to check that.
I feel that I am missing a setting within the WG3526's web admin dashboard. Is there a way to check a traffic log to see what the WG3526 is doing with my VPN connection attempt?
I have a WG3526 (Firmware is "GoldenOrb_2019-03-06") accessing the internet via 4G LTE, and a Unifi USG behind it which is placed in a "DMZ" via port forwarding as described here .
The USG is serving as a VPN server (L2TP/IPSEC), but when I attempt to connect to the VPN (using the public IP ...