On the back of the Cisco DPC3825 there are actually two different buttons.
There is the wireless setup (WPS) button that comes on most all Cisco/Linksys devices nowadays and a reset button. If you look right next to the WPS button, there is a recessed reset button, you will need a pen or other similar object to press the button.
With the router powered on, press the reset button with your pen and wait for the lights to change to orange. Once they're orange, remove your pen and wait for the gateway to boot up all the way. At this point you can reach the Gateway management page at http://192.168.0.1/. The username and password will be blank, just press login. Once you're inside it's highly recommended you change it, ans write down safe.
I hope this information is useful for you. if it was satisfactory for you, please mark the question as Answered.
Thanks Juan this info was very helpful for my dpc3825 I was able to get to my settings. Sure took more digging and searching than any of the other cisco products I had . Thank again this was just so right on to the answer.
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