An unsettling outage
My usually reliable internet went down at 1am. At 6am I noticed and began troubleshooting.
Reset modem no joy.
Reset router no joy.
Checked Comcast outage map no joy.
Then I unplugged the modem cable and re-inserted it. Problem solved.
I will replace the modem cable because - why not. But does anyone have a theory why this happened?
awebster last edited by
I can't comment specifically on Comcast, but I do know that providers will update the firmware in their cable modems from time to time, and I have seen exactly this issue where the cable modem doesn't come alive again after the update.
Rebooting it generally solves the issue.
Mmm, rebooting the modem and pfSense I would have expected to solve most things that might happen like that. Could have been actual bad hardware like a failing port or cable. You see any errors on the connection in Status > Interfaces?
@stephenw10 - No errors showing now on the interface. Inspecting the failing cable closely I do see a thin dark line on the inside edge of the connector pads. Could the modem port have been arcing and oxidizing the copper?
JKnott last edited by
If there's arcing, you've got power where it isn't supposed to be. The signal levels on the coax are on the order of millivolts.
@JKnott - Thanks. I will check to be sure the coax is still grounded and that my modem power supply hasn't gone wonky.