I got a new Ubee DDM3513 and it is blasting fast, but sadly even after 2 hours search I still do not know how to get in to set it up properly. my W7 is set up using the modems dhcp so I was guessing connecting to the modems IP ( default gateway ) but no go there. I already tried ip and port scanner to find out if the modem had a second ip or something but on luck there either. Of course I looked online on www.ubeeinteractive.com but they do not have the DDM3513 listed ... haha what a joke, really I am a bit upset to get an device fron Comcast without a user manual or any advice in how to set this piece of equipment up. Any advice would be helpfull.
I was surprised myself to not find anything on the manufactures web side and I am afraid you may be right that there is no user interface, in with case I will have to return it. I need something with port forwarding and be able to turn DHCP of and set up my own subnet.
If it is indeed a straight modem then http://192.168.100.1 (barring any username and password that may be needed) should work for access but this is for viewing the status only and there won't be anything that is able to be changed by the end user in there. If it is just a straight modem and you need that stuff then you will need to use a separate router.