We have seen people use ethernet over long coax cables (MoCA). Your test device should start as close to the router as possible.When possible, use a PC/MAC for the test with at least gigabit ethernet.Wi-Fi tests may be comparable in slower networks, but for anything beyond 200 Mbit, you should use Ethernet first. This takes all of the variables that come with Wi-Fi out of the equation. Test via an Ethernet connection to get a baseline.Make sure any ethernet switch can handle wire-speed switching for all the ports. If your ethernet is going through a slow switch, everything downstream will be slowed as well. Remember, the speed from one point to another point is only as good as the slowest point in the journey.Below is an example for macOS where the speed can be set to automatic or to a fixed speed. A bad cable or connecting to a slow switch can cause a device to slow the connection automatically. On other devices, check to see the device settings to make sure they are connecting at the speed you expect and that a slower speed wasn't manually or automatically set.On Firewalla, tap on Settings > About > Port Speed to look at port speed to check the speed of devices connected directly to Firewalla.Sometimes devices will negotiate at a lower speed.If you have any doubt about a cable, test or replace it. Make sure cables are in good condition.Replace any CAT 5 cables if you find them. Gigabit networks require CAT 5E, 6, or 7 ethernet cables. By testing each separately you can quickly identify where any issues are.
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