This took way longer than I would have liked, but at least it seems to be working right now.
After moving recently, I needed to purchase a new router, leaving my rooted Google WiFi AP’s behind. I decided to replace it with a D-LINK AC2600 EXO MU-MIMO Wi-Fi Router. After some more router related fun, I was able to get DD-WRT custom firmware running on the device. With that finally in place, my next project was to get the OpenVPN Server feature enabled. I had all the certificates & keys I needed, it was just a matter of getting the right config in the DD-WRT Admin GUI. Below is what I finally had in the “Additional Config” field that, that ended up working:
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