I have my home network behind a wireguard VPN connection. The wireguard “server” is run on a debian computer and the home network is handled by an opnsense computer.

Edit: opnsense does DHCP but a switch does the actual local routing, so opnsense isn’t involved in 10.0.66.XXX <-> 10.0.69.XXX comms.

My home network is on the subnet 10.0.69.XXX, while the VPN connection gets the subnet 10.0.66.XXX.

Weirdly, this setup worked fine until yesterday for the PS Remote Play app (hard requirement, iOS device). Nothing changed as far as I can tell - but yesterday the PS4 stopped being found by the PS Remote Play app (when I’m home on the 10.0.69.XXX subnet, the PS Remote Play app works fine).

I suspect from what I can google ( https://www.snbforums.com/threads/ps4-remote-play-over-vpn.60629/ , https://github.com/williampiat3/ImprovingPSRemotePlay#longer-and-more-complex-solution ) that to make it seem to the PS Remote Play app that all is well abs. 100% I need to get my device on 10.0.66.10 to do a broadcast search on the 10.0.69.XXX subnet (or have a 10.0.69.XXX address).

I feel (hope) there is a way to do this, but I am no iptables wizard. Does anyone know how to accomplish this? The solutions linked don’t make sense to me in a practical way to apply them.