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Forum Discussion
CM500V Cable Modem Intermittently Loses Connection on Xfinity Network
Within the last few days of late May and early June 2020, my internet connection has randomly dropped and not recovered until the modem was power cycled. Upon each instance of the connection failure...
I would let your ISP know about this and how them what your finding.
You might get another modem and put online and see if that exhibits the same thing or not. IF it does, then the ISP needs to fix there signal on the line.
After finally getting an Xfinity technician involved, it turns out that Xfinity may have been performing some maintenance on the line that my residence is connected to. The tech indicated that the maintenance activity was noted in their "watchtower" system for the dates that I reported issues, and that the first level customer support should have seen this as well. While the connection problems were solved by me each time by power cycling the modem, it was a major nuisance to experience this while working from home. Thus, this was not a modem problem, however a fault tolerance feature that recognizes when a channel's power level reaches 0 and reboots the modem automatically would really be nice, given that Xfinity can cause such problems at any time without warning.
My router logs (Nighthawk R6400v2) also revealed multiple DDOS attacks during the period in question. The attacker seemed to have performed a network scan and located an open port on my router that I occaisionaly use for remote access to my system. After closing this port, the scans continued for a few days, then subsequently stopped. I failed to mention this to the Xfinity tech, as I wanted to him to reveal if Xfinity was truly the cause of this problem. So, as it stands, the network attacks have stopped and Xfinity is finished maintaining lines in my area. We will see if any of this happens again.