I originally though I have a problem with my OpenVPN setup.
But, I’m not sure now.
I am testing using wifi connected android device.
If I ping from the wifi device (it now has an IP address on my green LAN) to an PC on my green LAN, in wireshark I can see the request and the reply. But, the reply is never seen by the requesting device.
ipfire logs show no evidence of the reply being dropped.
The other thing is other apps, like my home control, seem to work fine. But only with IP addresses, not url’s. So, it appears DNS is not right, but, it works fine from/to hardwired hosts on the LAN.