Issue with VPN's default gateway and netmask
OpenVPN Client Connect For Windows | OpenVPN Jul 13, 2020 Troubleshoot Mobile VPN with IKEv2 Verify the Firebox is the default gateway or has a route for the VPN client's virtual IP network through the Firebox. Users can connect to the VPN and to network resources by IP address but not by domain name. To verify the VPN client configuration includes your internal DNS …
VPN Client (the LAN gateway) My Odroid-C1 acts as the OpenVPN client in my LAN. Since the Odroid-C1 runs an Ubuntu 14.04 minimal image, all I need is to apt-get install openvpn. Once there’s a client configuration file in /etc/openvpn, Ubuntu will start the connection to the remote VPN server automatically when the Odroid-C1 boots.
What is AWS Client VPN? - AWS Client VPN Client VPN network interfaces. When you associate a subnet with your Client VPN endpoint, we create Client VPN network interfaces in that subnet. Traffic that's sent to the VPC from the Client VPN endpoint is sent through a Client VPN network interface. Source network address translation (SNAT) is then applied, where the source IP address is SSL VPN – NetScaler Gateway 12 / Citrix Gateway 12.1
Since this doesn't require any changes on the client side, it's probably the easiest if you have many clients. Add a specific route to 192.168.1.0/24 using 10.1.0.1 as the gateway - this needs to be added on every client. Some VPN clients have a configuration setting to add routes every time you connect.
What is a VPN Gateway? - Definition from Techopedia