OpenWrt Wireguard Client

[Lynx]

It's fiddly but once set up it's done and you can leave it be for ages.

I think I had to add the IPv6 address in allowed IPs here:

Also you may want to consider the simple nftables-based pbr that is configurable through LuCi:

Set different Upstream for specific source IP

In addition to the above perhaps this example might help provide inspiration: The idea is to set a routing table for each interface and then set rules for routing packets through each interface. I think the reason your rule above doesn't work is because it lacks a routing table for VPN. So I think you should label tables as described here: Here are mine: root@OpenWrt:~# cat /etc/iproute2/rt_tables # # reserved values # 128 prelocal 255 local 254 main 253 default 0 …

This allows you to configure which addresses go where (either directly out through WAN) or through VPN. And all through the LuCi GUI. Fantastic.