SamKnows TL-WR741ND firmware

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Nyr
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Joined: 31 Oct 2011
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PostPosted: Mon Oct 31, 2011 18:30    Post subject: SamKnows TL-WR741ND firmware Reply with quote
Hello,

I had just got a TL-WR741ND v2.4, the router that SamKnows is currently distributing in Europe. Factory firmware seems to be very capped, no web interface, no telnet and no SSH.

Does anyone know if using RS232 is the only option to flash a new firmware?

Edit: done! -> http://blog.nyr.be/hacking-the-whitebox/


Last edited by Nyr on Wed Nov 02, 2011 20:41; edited 1 time in total
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PostPosted: Mon Oct 31, 2011 21:52    Post subject: Reply with quote
do
www.dd-wrt.com/site/support/router-detection

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Nyr
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Joined: 31 Oct 2011
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PostPosted: Mon Oct 31, 2011 22:54    Post subject: Reply with quote
It seems like people had installed dd-wrt in this router without problem and the 2.4 hardware revision is known months ago.

The problem here is the firmware distributed by SamKnows, since it's very capped, I can't find any "easy" method to reflash other firmware, basically because no administration interface is available to the end user (it probably calls home to check for updates silently).
slybunda
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Joined: 09 Jan 2010
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PostPosted: Tue Nov 01, 2011 18:09    Post subject: Reply with quote
tftp flash should work
Nyr
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Joined: 31 Oct 2011
Posts: 13

PostPosted: Tue Nov 01, 2011 18:13    Post subject: Reply with quote
TFTP is probably what I will do if nothing easier is discovered by other owners of this router on a few weeks Smile
delta9
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Joined: 02 Nov 2011
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PostPosted: Wed Nov 02, 2011 15:33    Post subject: Re: SamKnows TL-WR741ND firmware Reply with quote
Nyr wrote:
Hello,

I had just got a TL-WR741ND v2.4, the router that SamKnows is currently distributing in Europe. Factory firmware seems to be very capped, no web interface, no telnet and no SSH.

Does anyone know if using RS232 is the only option to flash a new firmware?



I got my hands on one of those too recently. These units are running OpenWRT so you can simply put them into their failsafe-mode.

Here is how I've been able to connect to it:

1.) Connect to the first LAN-Port of the router and give your PC a static IP (192.168.1.2, gateway etc is not required)
2.) Start the device and once you see the 2nd LED of the device lighting up - immediately press the QSS-Button (located besides the reset button) a few times until you see the 2nd LED blinking really fast.
3.) Now you should be able to ping and telnet to it.
4.) Once connected using telnet - mount JFFS2 using the command "mount_root", then simply set a new root password ("passwd") and reboot using "reboot -f".
5.) The router runs a SSH-Server on port 2222 - so just connect to it as root using your newly setup password and explore the device.

That's all I've done so far but I think from here on it should be simple to re-flash the device. Wink

Greets
delta9
Nyr
DD-WRT Novice


Joined: 31 Oct 2011
Posts: 13

PostPosted: Wed Nov 02, 2011 15:48    Post subject: Reply with quote
That is great progress, delta9!

I will take a look this weekend.
Nyr
DD-WRT Novice


Joined: 31 Oct 2011
Posts: 13

PostPosted: Wed Nov 02, 2011 20:40    Post subject: Reply with quote
I had just flashed a custom firmware to the router Very Happy

And I had published a little tutorial for the less technical guys here, if anyone wants to read it:
http://blog.nyr.be/hacking-the-whitebox/
ReDaLeRt
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Joined: 26 Oct 2010
Posts: 79
Location: Portugal

PostPosted: Thu Nov 03, 2011 23:18    Post subject: Reply with quote
Hi,

There is any way to revert on original firmware?


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Nyr
DD-WRT Novice


Joined: 31 Oct 2011
Posts: 13

PostPosted: Thu Nov 03, 2011 23:24    Post subject: Reply with quote
The source for the firmware is here:
https://files.samknows.com/~gpl/

Binaries will probably appear here in the future, but seems like they aren't available at this moment:
https://files.samknows.com/~support/firmware/

Anyway, before flashing, you could make a image of your current firmware, but I don't know what would be the best way to do that.
ReDaLeRt
DD-WRT User


Joined: 26 Oct 2010
Posts: 79
Location: Portugal

PostPosted: Fri Nov 04, 2011 1:07    Post subject: Reply with quote
Hi.

Problem solved. I figured out how to backup the whole router. Smile

Requirements:
Arrow FTP Server on your PC (Filezilla Server, e.g.);
Arrow Putty.


Steps:
Arrow Set your IP for 192.168.1.2 (e.g.)
Arrow Run the follow command on PC: "ping -t 192.168.1.1"
Arrow Connect the router with your PC and power on;
Arrow After you get ping responses, press the "QSS" button on the router;
Arrow Connect to it through Telnet (192.168.1.1:23)
Arrow Run the following commands on Telnet:
Code:
dd if=/dev/mtd0 of=/tmp/u-boot.backup
dd if=/dev/mtd1 of=/tmp/kernel.backup
dd if=/dev/mtd2 of=/tmp/rootfs.backup
dd if=/dev/mtd3 of=/tmp/rootfs_data.backup
dd if=/dev/mtd4 of=/tmp/art.backup
dd if=/dev/mtd5 of=/tmp/firmware.backup

Arrow Use the /usr/bin/ftpput to upload every single file on your FTP Server (PC);
Arrow Get a beer and be happy. Cool


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Last edited by ReDaLeRt on Fri Nov 04, 2011 23:21; edited 1 time in total
Nyr
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Joined: 31 Oct 2011
Posts: 13

PostPosted: Fri Nov 04, 2011 9:54    Post subject: Reply with quote
Can you upload the dd dumps for us? As long as I know that is ok for a project forked from a GPL one.

Yes, I could had dumped this before flashing, but totally forgotten that with the emotion of the moment Razz
GoNx
DD-WRT Novice


Joined: 07 Nov 2011
Posts: 2

PostPosted: Mon Nov 07, 2011 17:29    Post subject: Reply with quote
Confirmed, It works with DD-WRT!

Here's the backup of dd dumps:
http://www.multiupload.com/20T3O8U2AP
Nyr
DD-WRT Novice


Joined: 31 Oct 2011
Posts: 13

PostPosted: Mon Nov 07, 2011 17:44    Post subject: Reply with quote
GoNx, thank you for the dumps!
GoNx
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Joined: 07 Nov 2011
Posts: 2

PostPosted: Tue Nov 08, 2011 7:03    Post subject: Restore Backup Reply with quote
I would like to know how to restore that backup

Last edited by GoNx on Tue Nov 08, 2011 8:09; edited 1 time in total
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