Increase Your Internet Speed upto 50Mbps

Most of us will be feeling that the surfing speed which is allocated by our ISP is not enough. People with 64Kbps will think 128Kbps will be cool speed. People with 128Kbps will think 256Kbps will be cool and so on

This tutorial will teach you how to increase your 64Kbps link to 512Kbps or what ever speed you like.

It is very much possible to do this. With a bit of luck if your Cable Internet Service Provider are very uneducated on how this very new technology works and leave some key loopholes open for you to grab vital information on how to accomplish this task. But this tutorial will no guarantee you 100% success.

Okay here we go. I'm going to try to explain you as best as I can to accomplish re-configuring your SB5100, SB4100 or SB3100 cable modem

Theory of cable modem working

All the cable modems when it boots up it will search for an �Image file� where in all configuration like your upload speed limit and download speed limit is defined. This �Image file� is stored in ISP`s TFTP server. Modem will be pre-configured with the ISP`s TFTP server IP address and the Image file name to be downloaded. When the modem boots up it query TFTP server and download Image file from TFTP server according to this this our speed limits will be set.

Our Mission

Get this Image file from ISP`s TFTP server, reconfigure it according to our need and force our modem to download this file from our Computer rather than downloading it from our ISP`s TFTP server.

Steps to accomplish

1). Get cable modems MAC address
2). Get your ISPs TFTP server IP address
3). Get name and path of the �configuration file� or Image file stored in the ISP`s TFTP server.
4). Download Image file from ISP`s TFTP server.
5). Decrypt the Image file which you downloaded from ISP`s TFTP server
6). Modify the Image file
7). Encrypt the modified Image file
8). Change your computer�s TCP configuration same as ISP`s TFTP server (i.e. IP address same as ISP`s TFTP server)
9). Host TFTP server in your computer
10). Put Image file in the base directory of your TFTP
11). Restart your modem
12). Changer your PC's IP back as given by ISP
13). OOPS Done. Start surfing with your new speed



1). Get cable modems MAC address

You can either look at the back of the modem to get this MAC Address or you can logon to your Cable modem with your Web Browser http://192.168.100.1/ . This is internal HTML pages stored within your DOCsis cable modem (SB5100, SB4100 and SB3100) that gives you even more vital information on configuration. Unless it is turned off by your ISP. This feature might be totally turned off by your ISP.


2). Get your ISPs TFTP server IP address
3). Get name and path of the �configuration file� or Image file stored in the ISP`s TFTP server.

For getting this vital information you have to do an SNMP walk over your modem. For doing this you can use any one of the tools below

a) There�s a program called QUERY.EXE from Weird Solutions which is a BOOTP packet request program that will tell you everything you need to know, without all these extra steps. It will display the Image Filename, TFTP server address, which is really all you need to get started. To use this BOOTP QUERY tool, you need the MAC address of your cable modem

You can download this from:
http://www.weird-sol..._bin/bootpq.exe

Or

B) Experts can use Solarwinds SNMP program

You can download this from:

http://www3.solarwin...-EE-V7-Eval.exe