Second router (LAN-to-LAN) with Wireguard VPN

Installing and Using OpenWrt Network and Wireless Configuration
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Hey everyone,

I just installed OpenWRT with luci-app-wireguard package (which installed 3 other packages) on my second router. I'm having trouble configuring OpenWRT as a Wireguard VPN client. I'm learning networking, but still not good with concepts to resolve this on my own. Can you please help?

Here is my setup:
Main non-OpenWRT router (Router1):

  • Connected to ISP internet
  • LAN IP address: 192.168.0.1
  • Subnet mask: 255.255.255.0
  • DHCP enabled: 192.168.0.100-199

Second OpenWRT router (Router2):

  • Connected to Router1 with Ethernet cable (LAN-to-LAN)
  • Default settings, except:
    • LAN IP address: 192.168.0.2
    • Subnet mask: 255.255.255.0
    • Default gateway: 192.168.0.1
    • LAN interface DNS servers: 1.1.1.1, 1.0.0.1
    • Created "wg0" interface:
      • General, Adnvaced, Peer Settings as usual (used my cloud Wireguard VPN server as peer)
      • Firewall Settings: Firewall-zone = wan

My PC:

  • Connected to Router2 using Ethernet cable
  • LAN IP address (static): 192.168.0.50
  • Subnet mask: 255.255.255.0
  • Default gateway: 192.168.0.1
  • DNS server: 1.1.1.1

Now, I see that there is little traffic coming in and going out in wg0 interface in OpenWRT router and in my Wireguard VPN cloud server, so I believe there is connection between them. But,

  1. how do I use it in my PC? How do I connect through wg0 interface?
  2. how can I implement a kill-switch in OpenWRT setup?

Thanks for looking into it.

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