My internet connection fails multiple times per day, always for about 6 minutes each time. I created a script to log the outages for the past few days and can provide those details. The script also checked to see if the internet could be accessed via the xfinitywifi SSID, and I found that for each outage with my Comcast internet access via my ASUS router connected to the cable modem, there was a corresponding outage via xfinitywifi which proves that the outages are independent of my ASUS router.
These outages have been occurring now for months. I have had a technician out on two separate occasions. The first time they replaced the cable modem. This did not fix the issue. The second time they replaced the grounding block and some filters on the coax line. This did not fix the issue. The second technician said that if the issue continued the problem must be at the box at the edge of our property, and to request someone to troubleshoot the issue from there.
I found a VERY similar issue reported (and solved) in the Comcast Support Forums: http://forums.xfinity.com/t5/Your-Home-Network/Intermittent-Connection-Issues/m-p/2665020#M12453
Please review the solution for that issue as a likely solution for my issue.
I am extremely frustrated in calling Comcast tech support as it takes too much time while they insist on going through the process of resetting my modem, turning the power off/on on the modem, etc. The problem is NOT with my cable modem. The problem is NOT with my ASUS router. The problem (according to the Comcast technician who came out) is NOT with the cabling in my home.
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