@uep @hugo
After much tears I was able to get this working...sort of. Site A router (opnsense) has a client on site B router (openwrt) working. From site B I'm at least able to ssh into the OPNsense router, so I'm calling that good enough for now.
I've set up a wireguard server on site B openwrt, that looks fine. Generated a client for it and ...well there's no client option on opnsense. Instructions look like it's just another peer as Hugo pointed out, meshily.
There's no direct "import this client config" option so I rammed the settings into a peer config but no dice yet.
Before I go checking firewall settings and whether tethering impacted - I definitely need this parallel peering setup right? It seems like it could have worked both ways with one pair...
#OPNsense #Wireguard