Hi, I had some experience with OpenWRT on Linksys Routers a decade ago, but it's proved pretty much useless trying the modern task of connecting two identical Routers (Fritzbox 7412) via WireGuard. I was inspired by a few articles on german c't magazin about flashing the 7412 to OpenWRT and WireGuard. Unfortunately they didn't cover the exact scenario I have in mind, which is to create a site-to-site (or LAN-to-LAN) VPN network using two dedicated Fritzbox 7412 routers (which on each site sit behind a primary Fritzbox handling the Internet connection, VOIP and stuff).
I got as far as flashing OpenWRT and installing Wireguard on the 7412, I could even connect to one site using Wireguards Windows Client.
But that was never the goal. What I like to achive is connecting the two networks transparently with Wireguard, so each time I adress an IP from the other network it connects over Wireguard and just works as if on my local network
Which is essentially like my two main Fritzboxes (7590 and 7490) do it now, after setting up their in-built IPSec VPN (very easy to do in the Router GUI). The only "problem" is, the native Fritzbox VPN variant is really slow, so I'm trying to resolve that with two dedicated 7412 building a Wireguard network.
Can anyone lend me a hand how to do the wireguard config on both 7412 routers running OpenWRT (and possibly any static routes to set on the main routers)?
Thanks in advance - Mark