Troubleshooting AWS Client VPN: Routing traffic to LAN not working as expected

Problem

Trying to route traffic to local area network (LAN) not working as expected when the LAN IP address ranges are not within the following standard private IP address ranges: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, or 169.254.0.0/16.

Cause

If the client LAN address range is detected to fall outside of the above standard ranges, the Client VPN endpoint will automatically push the OpenVPN directive "redirect-gateway block-local" to the client, forcing all LAN traffic into the VPN. For more information, see Rules and best practices for using AWS Client VPN.

Solution

If you require LAN access during VPN connections, it is advised that you use the conventional address ranges listed above for your LAN.