A hub will limit your speed significantly. They aren't usually bidirectional. I used to use a linux PC with multiple ports. You can enable port forwarding and

A hub will limit your speed significantly. They aren't usually bidirectional. I used to use a linux PC with multiple ports. You can enable port forwarding and capture traffic as it passes through. Use a 3rd port to access it. However, I've recently acquired a managed 5 port switch. I didn't know these were available, but they are awesome and pretty cheap. Example: https://www.amazon.com/TP-Link-Ethernet-Sheilded-Replacement-TL-SG105E/dp/B00N0OHEMA https://www.amazon.com/TP-Link-Ethernet-Sheilded-Replacement...