I had a similar issue to this some time ago. I upgraded our internet at home to Comcast's 250 megabit package, in doing so I had to upgrade our modem. I picked

I had a similar issue to this some time ago. I upgraded our internet at home to Comcast's 250 megabit package, in doing so I had to upgrade our modem. I picked up a Motorola/Arris Surfboard 6183 I ended up with an interesting issue where the modem itself would "hang". My ping to Google would skyrocket from 5ms to 3000ms+, my download speed would drop from 250~ megabits to 0.20, the upload speed however would remain constant at about 30Mbps Rebooting anything and everything had no effect, throwing various kinds of routing equipment in front of the modem (from OpenWRT to PF sense to even OpenBSD) made no difference. Eventually I purchased a "KanKun SmartSwitch". Some cheap Chinese wall adapter that you could power devices on and off using a phone app. Conveniently it ran OpenWRT and was hackable, so I was able to automate simply rebooting the modem when pings spiked into the 4 digit range (pinging Google every 60 seconds with a simple bash script) I spent months talking to various Comcast departments. Technical Support, Tier 2, Tier 3, NOC, Headend, Engineering. Eventually I was told that (across the 14 states in my "division") there's only about 20,000 of the model of modem I had, simply not enough to be able to establish a problematic pattern (presumably most customers would just reboot the device when it crashed Frustrated, I noticed on the Amazon store page that there were numerous complaints about the device with the same issue. I assumed it most likely to be a firmware issue, as the headend engineering team could not correlate any changes from my device on the node at the timestamps I gave them, still archived here http://intelminer.com/reboot.txt http://intelminer.com/reboot.txt Upon speaking to Amazon about a refund or exchange, they referred me to Arris/Motorola citing it was under warranty. Arris/Motorola then "helpfully" explained that they certify everything BUT the software of the device to be functional, as such I was not covered under warranty. (But hey why not buy a Surfboard 6190 instead? it IS newer!) It seems like almost a racket for planned obsolescence. Release a decent modem, hire some interns to write crap software, then encourage the customer to "upgrade" the "faulty" hardware when they call in. After all, it's not under warranty now is it?