I have a Ubiquiti USG that I have the Remote User VPN setup on (LT2P with PSK).
Can Openswan / Strongswan connect to that? I haven't found a walk through on the internet.
Background: I am using a Raspberry Pi running Raspbian that I am using to connect to the USG.
That is IPSEC. It is different settings, so not with your L2TP. But yes.
Awesome, thank you!