Hi,
It sounds like you're not getting the full bandwidth from your ISP due to a few potential factors. First, check that your WAN port on the MX68CW is correctly configured for the speed your ISP is providing. Ensure that you're using the correct port (typically the primary WAN port) and that it’s set to the right speed in the Dashboard.
Additionally, verify that you're using a high-quality Ethernet cable that supports gigabit speeds. If you're using a cable rated for lower speeds, that could be limiting your throughput. Also, check if there are any traffic shaping or QoS settings in your Dashboard that might be limiting bandwidth. Lastly, consider running speed tests directly from the MX68CW to rule out any device-specific limitations and ensure the throughput issue is isolated to the MX68CW.