[ervau]

Hello,
as already reported FW39905 crashed my DIR-825. Cracy is that:
- after reset I get an IP under Debian and Win7 from the DIR like 192.168.1.x and I see the DIR as DNS 192.168.1.1 with my PC; but when I try to reach the DIR in FireFox with 192.168.1.1 an error comes up "no connection to this server";
- when I link the DIR to my main Router Lan to Wan (router cascade) and my PC to Lan of the DIR I reach the INet w/o any problems;
- after 30/30/30 I get the Recovery Mode under 192.168.0.1; I can choose some bin-file, but after tapping upgrade an error comes up "upgrade failed" w/o starting to count %, it doesn't matter wether I try D-Link-FW/ dd-wrt/ open-wrt (factory or upgrade);
- in Acrylic Wi-Fi home I see the two SSIDs of the DIR as dd-wrt 2,4GHz and 5GHz.
No difference between Lan and WLan.
So my conclusion is that the DIR-825 isn't dead at all. I only am not able to install any FW or to reach any setup site.
Is there any chance to force a new FW onto the device and -if yes- how?
Thx in advance.
ervau

[Wildlion]

I am assuming that you ahve tried the DLink emergency flashing page.

Have you tried serial, or ssh/telneting in to the router?

have you tried command line upgrade/downgrade?

[ervau]

Hello Wildlion,
as mentioned in my post
- after 30/30/30 I tried to downgrade the FW via the Emergency Mode (I think that‘s what you mean with D-Link emergency flashing page?!)
- I‘ve also tried to reach the device via WinSCP, no success (what can I do there?)
- command line up-/ downgrade how to do?; I always used Firefox
ervau

[ervau]

add on:
- in CMD (Win) I can ping 192.168.1.1 successfully
- via PuTTY Telnet/ SSH -> connection refused by server

[ian5142]

Besides the Emergency Recovery room, the next step is serial.

This page is a start: https://openwrt.org/toh/d-link/dir-825#serial

DON'T CONNECT the 3.3V pin EVER.
The COM port settings from that page should work though.

At the very least serial will tell you what the router is doing.

I have recovered my D-Link 825 B1 both via the Recovery Room and via serial. Have patience with serial, nearly every router has different serial commands in order to flash the firmware.

[ervau]

Thanks ian5142 for your reply.
Looks pretty dangerous
But let's see how far I get it.
I stripped the device and I found near the wps-switch a "four-hole named JP1 port" w/o any other markings. That's the COM port?
How do I proceed? If it's section "A C Program to flash DIR-825" I'm afraid it exceeds my capabilities.

[ian5142]

Serial program, I use PuTTY but Br@y's Terminal or another will work fine.
Settings are in that link I sent.

You will need something like this: https://www.adafruit.com/product/954

As I mentioned don't use the 3.3V pin, it is not required. Just Ground (GND), Rx and Tx.

Plug in the USB side of the adapter, set up the program.

Hook up the 3 wires.

Then plug in the router's AC adapter, see what happens.

[Wildlion]

Here is a reference article about serial recovery:

https://wiki.dd-wrt.com/wiki/index.php/Serial_Recovery

[ervau]

Hello Wildlion,
thx again. I modified the DIR with a 3-pin-connector and ordered a USB-to-sereal-cable (takes some time to ship from China to Germany) and read your last post. When everything is ready I'll be back again.
ervau

[ervau]

Hello Wildlion,
I don't have the cable up to now. But nevertheless it -the DIR- talks to me again. I don't know why and why it didn't before but now it does.
I assume the reason why it didn't was simply an active "NoScript" in Firefox, absolutely not sure.
But anyway I like to learn how to "serial" the device.
With PuTTY SSH and Telnet I get a surface (I hope with serial there's no difference; when I have the wiring)
"DD-WRT v3.0" "BusyBox v1.30.1 ..." and a prompt "root@[i]DEVICE[/i]:~#".
How do I proceed; what are the commands (I fount some for BusyBox in the INet); where do I get the FW from, it's the bin-file from ftp://ftp.dd-wrt.com/betas/? Is there a step by step instruction?
Thanks in advance.
ervau

[Wildlion]

If the firmware has booted and is up, via telnet or serial or ssh, you will reach the command line and here is the dd-wrt wiki reference:

https://wiki.dd-wrt.com/wiki/index.php/Telnet/SSH_and_the_Command_Line

if you are in the boot loader via serial the first reference is what you need.

Recovering the firmware versus flashing is different.

If you want to flash the firmware via command line an example would be once you have logged into the router:

[ervau]

thanks again and 'scuse my inexperience!
The CODE:.... you post requires INet connection of the DIR?! My provider only gives routers to us customers no modems.
How the CODE:.... looks like when the DIR and the PC have no INet and the file is already on my PC f.ex.
D:\Archiv\driver\xp_7\Netzwerk\DLink_DIR825\DIR825_RevB_DD-WRT\dir825b-firmware_39956.bin
?
ervau

[Ah-Pin-Kor]

If the firmware file is on your PC and you can ssh into the router, you can use scp to transfer the file from PC to router.
Use winscp (with nice gui) or pscp.exe (from putty package). Transfer the file to router's /tmp dir.
Then ssh into the router, cd /tmp, and run the "write firmware-file linux" and reboot.

[ervau]

Hi folks,
thanks for your support (up to now )!
Both procedures work fine, loading from the INet or copying from the PC and "writing to Linux" with telnet/ SSH or WinSCP. One requirement is necessary as I found out: telnet and/or SSH have to be set enabled in the settings of the router. That's not the case when the DIR is set to factory defaults; there both are set to disabled. So no connection is possible?! Or is there a way to set to enabled "from outside" and not via the INet Explorer control panel?
Is that the same when to use serial (up to now I didn't have the chance to test; USB cable isn't here yet/ RS232 cable I didn't fix up to now)?
ervau

[Wildlion]

ssh and/or telnet have to be enabled, it does not matter if you use command line or web interface to enable them. Command line can be accessed via ssh, telenet, or serial. Serial is always enabled (unless you go out of your way to disable it).