Quote Originally Posted by Delfuego View Post
You can still use any router/firewall inside Comcast business. Their Arris modems will pass all traffic to your configured device. You can have them set nat/dhcp off too and it becomes just a modem at that point. We have no issue passing any type traffic from WAN. We have every brand of firewall you can imagine inside Comcast customers office with no real issues.
Completely understand that you can have real equipment behind it. We do. I appreciate you offering information that I may not have had.

We have spent hours on the phone with them, tried 3 different shitbox "modems", and it still answers packets that it is supposed to do nothing but hand off to the firewall/router. The tunnels and customer data don't like CC "modems" answering some, but not all, packets that it should just forward.

We have no issues at any of our fiber connections. Just CC business...