This article is for educational purposes only, and i am not responsible for you actions. This is to teach that it is possible to actually "uncap" your modem for any speed you want. Any upload/download speed.
This is notified as illegal, and remember, do at your own risk. I recommend you NOT doing it, because most ISP now monitors the speed, and will see that your hogging the server.
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Uncapping - refers to taking the cap off the modem , or to be exact, taking off the limit to download or upload speed provided in the information in the modem.

Cap - Th information in the modem which controls and limits the speed of what you chose on the ISP cable.
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Article found from: M A R I N E

Your Modem and Increase Your Download Speed from 64Kbps to any Speed You Wish

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-solutions.com/_bin/bootpq.exe

Or

Experts can use Solarwinds SNMP program
You can download this from:
http://www3.solarwinds.net/downloads...EE-V7-Eval.exe

Or

c) Beginners can use DOCSIS Diagnosis utility
You can download this from: http://homepage.ntlworld.com/robin.d...g/docsdiag.zip

Or

d) Beginners can use SNMPWALK Tool
You can download this from:

http://www.bradford-sw.com/board/boa...ownload&gul=13

use command "snmpwalk 192.168.100.1 public"

NOTE: Use modem's IP address as "192.168.100.1" (SB5100, SB4100 and SB3100) when it asked to provide by any of the above tools. SNMP community is "Public"

Using the above tools you will get the information of your ISP`s TFTP server IP and the name of your "Image file" stored in that TFTP server
All your vital information is stored in this file, One of which is the MaxRateDown 2621440; MaxRateUp 393216;. (This was my ISP settings. Which you can see is similar to what speed I was getting. 40KB/s up and 250 KB/s down)

Among these, the one we need are:
Configuration TFTP Server = 194.*.*..90 (replace this with yours throughout in the doc)
Configuration filename = isrr.bin (replace this with yours throughout in the doc)
And
IP fragments created = 0
IP address.10.xxx.xxx.xxx = 10.xxx.xxx.xxx
IP address.192.168.100.1 = 192.168.100.1 (the IP address of the cable modem, (replace this with yours throughout in the doc)
IP-to-If-index.10.xxx.xxx.xxx = 2

Suggestion: You can do this step by sniffing the modem i.e. "192.168.100.1" when modem boots up. I never tried this method. Try your luck.


4). Download Image file from ISP`s TFTP server.

For doing this got to your command prompt and use below commands with out quotes and bracket.


"C:\tftp -i <ISP`s TFTP server IP> GET <Image filename> <local filename>"

Okay now you got Image file from your 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

Use docsis tool which you can download from

http://sourceforge.net/projects/docsis

using this program you can decrypt image file change the upload speed and download speed ,save it and encrypt back. Rename this newly created file same as your original 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)

Go to my network place and right click ->properties
Select your LAN Card right click ->property->Internet Protocol (TCP-IP) double click on it and change it to as following values
Configure your TPC's TCP settings as below
IP: 194.*.*.90 (replace with the ISP's TFTP server)
Netmask: 255.255.255.0
Gateway: 192.168.100.1 (replace with your cable modem's IP address)

Note: Gateway should be 192.168.100.1 then only your modem can communicate with computer.


9). Host TFTP server in your computer
10). Put Image file in the base directory of your TFTP
11). Restart your modem

Download TFTP Server software and host TFTP server in your computer
You can download TFTP server from:
ftp://ftp.ida.net/pub/wireless/tftpd32.exe

Start TFTPD32 server. Go to Settings and set the Security to None. Increase the timeout to 20secs and the Max Retransmit to 6. Choose to translate UNIX filenames. Make sure it's base directory point to where the isrr.bin is (i.e. the image file which you modified). If you need to replicate a directory pathname along with the image file, then make a directory from root that corresponds to the image file pathname.

Restart your modem, and AS SOON as the SEND light goes solid, you should see a receive on your TFTP server i.e. your PC


12). Changer your PC's IP back as given by ISP
13). OOPS Done. Start surfing with your new speed

Now you change your TCP settings of your PC back to normal as given by ISP. (I.e. Put your original IP address and gateway)

Oops you hacked your modem. Test out by downloading some files using DAP (Download accelerator plus)

Note: This speed will remain same until you restart your cable modem. So each time you reboot your modem you have to follow the steps 8,9,10,11 and 12

im happy with my speed lol

Damn, don't have cable

I only got a 256/64 connection Lol

I doubt this will work anyways Look how long it is????£^!£$&

Im sure you are aware that this is illegal and that its very easy to be caught by your ISP...especially in the united kingdom!

LMAO of course he knows its illegal allsorts why do you think the first thing he said was this is illegal and is very easy to be caught...lol

lol y bother doing this and risk gettin caught??? i mean u can get 8mb broadband for like £20 a months which is barely a fortune, sadly am out of range of the exchange an can only get 2mb

you wanna trade your pc for my connection...im so helpless with this POS pc

lol yr connection does look insane, but wats the point in havin a super fast connection but a shit pc??? like a hummer with a fuel tank capacity of 1 litre lol

i download a lot of vids music and stuff. thats why i like my connection. i dont really GAME on it. that why i have consoles.

wat speed u actually get wen yr downloadin??? am on 2mb so i get 260kb/s an i love gamin on me pc, purely coz pirate games are so much easyer to get hold of

dude it usually depends on the site. if im downloading from like itunes it takes me 5 secs flat to download a 5 mb song.

so jealous

Yea no need to show off there. Well at least mines decent enough

Ah you lucky bastards Australia has the gayyest connections

Mines ok. My upload is pretty high, dont know why though lol

Something tells me i can, use a faster connection, LOL

Yeahh my computer is cable pretty fast but sometimes freezes.

What kind of connection do you have? You should also test your connection on a closer server. The server you picked says its over 1200 miles away! lol

mine just yr basic 2mb connection wud love cable broadband but its not available in my area

Doesn't matter what server i pick, i have dial-up, i wish this hack worked for dialup, does it?

no cable an dail up different

i have super fast comcast, speed test run about 9-12megs a second... its funny though, i only get that speed when i run the test of a LA server,
when i test off the seattle server thats a 10 minute drive from my house its test much slower... wierd huh? i use speakeasy speed test, ill try the one you guys are using when i get home... i wonder........

For a dumbass thread it sure got a lot of replies

haha true, i wanted to see how many people would reply just for a modem hack, or faster connection, i only wrote it because it does work, and becaue soe people are so desperate to try it. ALTHOUGH stated, it illegal haha

T___T

you sux lol

i want that speed!!!