29-12-2016, 05:11 AM
There are usually two network configurations. (1) The PC is directly connected to the cable modem. (2) The PC is connected to a NAT router, whose WAN port is then in turn connected to the cable modem. All of the following steps apply to both cases, except the final one that deals with TFTP. I’ll explain the issues with this later.
Every time the cable modem is powered on, it looks in its configuration file for the address of an TFTP server and for a file name. This file is the Docsis configuration file that, among other things, sets a cap for the modem’s download/upload bandwidth. The cable modem then retrieves that file and connects to the backbone.
How do we uncap it? Simple. We’ll download the docsis config file, edit it to change the cap parameters, then trick the cable modem in thinking our PC is the TFTP server so it then retrieves our copy of the docsis file.
Every time the cable modem is powered on, it looks in its configuration file for the address of an TFTP server and for a file name. This file is the Docsis configuration file that, among other things, sets a cap for the modem’s download/upload bandwidth. The cable modem then retrieves that file and connects to the backbone.
How do we uncap it? Simple. We’ll download the docsis config file, edit it to change the cap parameters, then trick the cable modem in thinking our PC is the TFTP server so it then retrieves our copy of the docsis file.