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My ISP is Xfinity (Comcast). A fairly slow100 Mb/S. Should not be stressing out the SB8200. It can run fine for hours and then "stall" for some reason. It takes about 45 seconds to clear, and then resumes normal operation. I don't have to reset it or pull the power cord. Still, very annoying for a state-of-the-art product. From the web interface "Product Information" page, I am running hardware version 6, software version SB8200.0200.174F.311915.NSH.RT.NA (believe it or not!). Can't the software guys come up with something more succinct?? I went to the Arris support page: no firmware updates available. My modem does not get super hot like others have complained about. Warm, but not hot. Plus, getting to the web interface page (192.168.100.1) is very intermittent. Sometimes it will work, sometimes my browser (Chrome) times out trying to get there. So, it's not a configuration or firewall issue. It's LOUSY FIRMWARE in the SB8200. I can't believe they haven't fixed the stall problem & this problem by now. This product has been available for a couple years. Very disappointing reflection on Arris. When (if) this modem eventually craps out, I won't be buying another Arris product. IMPORTANT UPDATE: This modem requires signal levels not considered "standard" by Xfinity (Comcast). Comcast considers 38 - 40 dBmV upstream power within range, but this modem requires 45 - 51 dBmV. Have your Comcast tech install an 8 dB attenuator on the modem (he can do this on site - no need to change anything @ the headend). My modem has been rock solid since my tech installed the attenuator on my modem (2 days). I will post an update next week after watching it for 7+ days. ANOTHER UPDATE: Modem has been running for 45 days without a single re-boot. I can get to the web interface (192.168.100.1) 100% of the time. Speed test has consistently been what I'm paying Comcast for. DEFINITELY HAVE YOUR TECH SET THE UPSTREAM SIGNAL LEVELS TO THE PROPER VALUES. I think that would eliminate 80% of the negative reviews of this product.