Boosting Xfinity Internet Speed

TL/DR; If you are using an older WiFi access point you may need to enable a setting called NAT boost, NAT acceleration, hardware NAT, or flow offload to see performance at the highest range of what the hardware vendor says it supports. It started with an email from Xfinity last Thursday saying it was time to upgrade our Xfinity TV equipment at no extra cost. I clicked through expecting a replacement for the cable set top box we have in the living room, but instead saw an offer to replace the Arris Surfboard cable modem we have used for many years with the Xfinity Wifi Gateway. Several years ago I bought the Arris Surfboard rather than rent a cable modem from Xfinity, they were reasonably priced and paid off in less than two years of avoiding the monthly rental fee. I wasn’t terribly surprised with Xfinity telling me the cable modem should be upgraded given its age, and the fact that while we have had 1 Gbps service provisioned I was seeing on average 320 Mbps of Internet speed.…