Region : Germany
Model : Archer C7
Hardware Version : Not Clear
Firmware Version : 3.14.1 Build 140929 Rel.33293n
Same Issue here.
The VPN Server(10.8.0.1) is running on a machine in the LAN (local IP 192.168.0.3 , IP forwarding enabled).
The TP-Link router is used as gateway (192.168.0.1). Port forwarding from WAN to the VPN Server is enabled.
A VPN Client(10.8.0.*) can successfully connect to the VPN Server over the Internet.
Now I'd like to access samba shares within the LAN that are located on a different machine (192.168.0.2) than the VPN server.
To do so, you have to "set up a route on the server-side LAN gateway to route the VPN client subnet (10.8.0.0/24) to the OpenVPN server" (source).
So I configured a static route on the Archer C7:
Destination Network: 10.8.0.0
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.0.3
However this doesn't seem to work. The VPN client can successfully connect to the VPN Server and the router with it's local IP can be pinged from the VPN client too. But the VPN client won't find any other machine on the LAN side. The strange thing is, when I install OpenWRT on the Archer C7 and apply the very same rules there, it works just fine.