The following sequence of events isn't making sense to me
Discovered that my custom password on the DPC3939B gateway did not work.
Decided to try to reset to factory settings using the reset button.
Tried the reset button (following exactly instructions from the Cisco PDF file) and the factory default password didn't work.
Repeated the reset button procedure. Still no go.
THEN, I read a hint on these forums that ,DPC3939B may be rejecting login even with correct password, because I was passing through my VPN appliance (which is between my LAN and DPC3939B). It is said to be a security feature. So...
Removed my VPN appliance from the picture, gave my PC a static address, and declared a gateway address corrsponding to DPC3939B.
Connected PC directly to DPC3939B.
Success. I was able to login.
BUT... but... when I was able to login, I was NOT using the default password, it was using my secret password that I had tried to get rid of. The default password still did not work. Recall that I had operated the reset button. Twice.
My point being, the reset button did NOT reset the password. Beyond any doubt, I followed instructions and the DPC3939B did restart on its own both times. So what is going on?
Could you please try depressing the little black reset button on the rear of the DPC39XX for a minimum of 15 seconds. This is the amount of time prescribed to insure that a full factory reset is actually restored, including to insure your default GUI login cusadmin/highspeed. Also,
if you have a Comcast Static IP (CSIP), it will be necessaery to contact 800-391-3000 to have your CSIP reloaded and reconfigured for its routing to be reimplemented.