Hello,
i have probably easy problem, but i can't solve it myself. Im looked on the forum similar problem but i can't find any working solution for me.

I have MT router (10.10.10.1, network 10.10.10.0/24) and my own NAS server (10.10.10.2). All working fine, if i don't using WireGuard connection to other location.

I sometimes need to use WireGuard VPN connection to connect to the other LAN in other localization for work. After i set up a WireGuard connection i can access remote LAN (Router - also MT, NAS server and other client's). But after im connected to the WireGuard VPN i cannot access my local NAS Server.

What firewall rule (or something else) i need to setup on remote router to allow VPN users to reach their own LAN? I have admin rights for their MT router.

Network diagram how its look now



How its should work after WireGuard conneciotns



Do you have any kind solution for this problem?

My Guess is the allowed IPs setting in your PC's wireguard client.

A setting that should work would be 172.16.0.0/24, 10.11.11.0/24

Unfortunately it is not solving the case.
My allowed IP is set as 0.0.0.0/0, but for test i set it to my local network, and i still cannot access my local nas

Ok i found a solution.
In AllowedIPs must be set to 0.0.0.0/1, 128.0.0.0/1. 0.0.0.0/0 means all the traffic goes throught the VPN Gateway and it avoid LAN.