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arris cm820 docsis 3,0 how to hack - Printable Version

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arris cm820 docsis 3,0 how to hack - zergshadow - 10-10-2017

I live in Ukraine internet voliacable docsis3.0. Very low upload speed 10, but someone have 20. One guy told me that i can somehow reconfigure my modem for 20.Someone know how to do that?

RE: arris cm820 docsis 3,0 how to hack - andytg - 10-10-2017

from sbhacker:

Quote:Hello everyone,

If any of you have a Arris modem such as the 820A, 860A, 852, 862G, etc and happen to have a locked bootloader. Do the following:

- Dump the flash with whatever you can use to dump a SPI flash.
- Load the backup into a hex editor.
- Search for "forceboot=1" (there will be a few instances of it throughout the flash)
- Modify "forceboot=1" to "forceboot=0"
- Save it.
- Reflash back.


Yes, change all instances of bootdelay=0 to bootdelay=5 on the Compal modem.


Shorted pin 8 to get into bootloader - thanks parker...

[Image: 1f28fe1_1455638464.jpg]

RE: arris cm820 docsis 3,0 how to hack - zergshadow - 11-10-2017

(10-10-2017, 05:53 PM)andytg Wrote: from sbhacker:

Quote:Hello everyone,

If any of you have a Arris modem such as the 820A, 860A, 852, 862G, etc and happen to have a locked bootloader. Do the following:

- Dump the flash with whatever you can use to dump a SPI flash.
- Load the backup into a hex editor.
- Search for "forceboot=1" (there will be a few instances of it throughout the flash)
- Modify "forceboot=1" to "forceboot=0"
- Save it.
- Reflash back.


Yes, change all instances of bootdelay=0 to bootdelay=5 on the Compal modem.


Shorted pin 8 to get into bootloader - thanks parker...
i have called like 30 service centers that repair modems and nobody knows what to do and dont have devices. How to decompile it nobody knows.

RE: arris cm820 docsis 3,0 how to hack - andytg - 11-10-2017

read this https://ru.scribd.com/doc/62539505/SB6210-SBH-Alpha-1-1-Premod-Guide#

see part 2 "Flash firmware via serial cable (U-Boot)"

also you will need such tool

then download the firmware forceware 1.4b1 mod1

then read this http://www.haxorware.com/forums/showthread.php?tid=3025

also will be necessary to disable 4 downstream channels in the settings of forceware, because otherwise this version will work unstably (see tutorial)

Serial cable connector

[Image: lEgWhfV_1.jpg]
upd: at the time when the modem is loading, it is necessary to short the eighth chip contact on the modem case as soon as the message appears
"Hit any key to stop autoboot: 0"
after this the loading will be interrupted
type
> printenv
then type
> setenv forceboot 0
> setenv bootdelay 5
> saveenv

then after rebooting the modem when the line appears
"Hit any key to stop autoboot: 5"
press SPACE bar

then see the part 2 "Flash firmware via serial cable (U-Boot)" in the manual https://ru.scribd.com/doc/62539505/SB6210-SBH-Alpha-1-1-Premod-Guide#

RE: arris cm820 docsis 3,0 how to hack - zergshadow - 12-10-2017

(11-10-2017, 05:29 PM)andytg Wrote: read this https://ru.scribd.com/doc/62539505/SB6210-SBH-Alpha-1-1-Premod-Guide#

see part 2 "Flash firmware via serial cable (U-Boot)"

also you will need such tool

then download the firmware forceware 1.4b1 mod1

then read this http://www.haxorware.com/forums/showthread.php?tid=3025

also will be necessary to disable 4 downstream channels in the settings of forceware, because otherwise this version will work unstably (see tutorial)

Serial cable connector

[Image: lEgWhfV_1.jpg]
upd: at the time when the modem is loading, it is necessary to short the eighth chip contact on the modem case as soon as the message appears
"Hit any key to stop autoboot: 0"
after this the loading will be interrupted
type
> printenv
then type
> setenv forceboot 0
> setenv bootdelay 5
> saveenv

then after rebooting the modem when the line appears
"Hit any key to stop autoboot: 5"
press SPACE bar

then see the part 2 "Flash firmware via serial cable (U-Boot)" in the manual https://ru.scribd.com/doc/62539505/SB6210-SBH-Alpha-1-1-Premod-Guide#

so isee that its hard for midddle user? one guy said then can make it for me for 16 $, but he dont know how much speed will i have? so you know what speed will be if i had bought 200/10 but i heard that they have 200/20.

RE: arris cm820 docsis 3,0 how to hack - Wichin12 - 12-10-2017

(12-10-2017, 03:31 AM)zergshadow Wrote: so isee that its hard for midddle user? one guy said then can make it for me for 16 $, but he dont know how much speed will i have? so you know what speed will be if i had bought 200/10 but i heard that they have 200/20.

In a 8x4 modem the maximun download is aproximately 270 MB and the upload is like 120

RE: arris cm820 docsis 3,0 how to hack - eltremendo - 12-10-2017

does any one know how to enable ssh on a arris modem that doesnt have the http://192.168.100.1/cgi-bin/tech_support_cgi ?

RE: arris cm820 docsis 3,0 how to hack - andytg - 12-10-2017

(12-10-2017, 03:31 AM)zergshadow Wrote: so isee that its hard for midddle user?

yes

RE: arris cm820 docsis 3,0 how to hack - drewmerc - 12-10-2017

(12-10-2017, 03:31 AM)zergshadow Wrote: so isee that its hard for midddle user?

no, a noob yes but middle no, this is basic modem hacking
it's hardly a full hard mod as theres no need to solder anything and all the tools needed to hack this are under $10

RE: arris cm820 docsis 3,0 how to hack - zergshadow - 16-10-2017

(12-10-2017, 05:33 PM)drewmerc Wrote:
(12-10-2017, 03:31 AM)zergshadow Wrote: so isee that its hard for midddle user?

no, a noob yes but middle no, this is basic modem hacking
it's hardly a full hard mod as theres no need to solder anything and all the tools needed to hack this are under $10

my internet cost 5$.ijm from poor ukraine.