@elia_s 

Hi there!
 

I’ve dealt with a similar setup before, so I totally get how frustrating this can be. Here’s a more tailored approach to troubleshoot the issue:
 

1. Check Firewall Settings:
    

   • Double-check the firewalls on both the VPN server and the client router. Ensure they allow traffic from the server to the client’s subnet. Sometimes, firewalls block incoming traffic by default.
      

2. Enable Client-to-LAN Routing:
    

   • On the VPN client router, there should be an option for "Client-to-LAN" routing. Enabling this ensures that devices on the client side can be reached from the server side.
      

3. Adjust VPN Server Configuration:
    

   • Ensure your VPN server is set to allow traffic to and from the VPN clients. Look for settings related to routing or access control lists (ACLs) that might be restricting this.
      

4. Add Static Routes:
    

   • You might need to add static routes on both sides. On the VPN server, add a route to the client’s subnet via the VPN. On the client router, add a route back to the server’s subnet. This ensures both networks know how to reach each other.
      

5. Verify VPN Settings:
    

   • Make sure your VPN settings, like IP address ranges and subnet masks, are properly configured. Misconfigured settings can often cause these communication issues.
      

I hope this helps!