Archer C9 V1 Firmware Upgrade Brick

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Archer C9 V1 Firmware Upgrade Brick

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
25 Reply
Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-12 23:49:11

@TNV I would use a port scanner (nmap) to see whether a web server is running on the router, and on which port(s)

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#14
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-12 23:52:17
I ran "nmap -p80 192.168.0.1" and it says that http is closed. It does say upnp (port 1900) is open though
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#15
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-12 23:57:18
What about port 443? Just do a full scan in nmap: -p 1-65535
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#16
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-13 00:15:00 - last edited 2020-01-13 00:15:50

I didn't bother scanning the whole range. Just ports that I might get access

 

PORT STATE SERVICE

22/tcp closed ssh

23/tcp closed telnet

80/tcp closed http

443/tcp closed https

8008/tcp closed http

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#17
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-13 00:23:51

@TNV That nmap shows the ports closed, it seems like MAC filtering or IP filtering had previously been implemented. Either that, or access to the admin page has been disallowed on the WiFi interface, and only allowed via wired -- is that what you're doing?

 

Now that the correct firmware is definitely on the router, maybe try another device reset.

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#18
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-13 00:39:22

@IntuitiveNZ 

 

Thanks for your help. I appreciate it. 

 

MAC filtering has never been enabled.

Regardless, I'm wired into the LAN ports on the router.

I've done another hardware factory reset (Reset button for 10 seconds).

 

Same results.

 

It's frustrating because the correct firmware should be on there, and a factory reset should bring it back to life. Especially since it's partially alive.

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#19
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-14 07:08:22 - last edited 2020-01-14 07:08:52

That is frustrating. What I would do is install DD-WRT on it. Use the same method as before to load the firmware on it, but put the DD-WRT file in its place. https://dd-wrt.com/support/router-database/?model=Archer%20C9%20(AC1900)_1.x

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#20
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-14 18:54:10

I've been able to use TFTP to send the firmware to the router, but it doesn't seem to be applying the firmware. I tried to upload the DDWRT factory-to-ddwrt.bin and it didn't seem to take.

 

I can sort of check this by using nmap's host OS detection stuff. It doesn't seem like that is changing at all when I change the recovery firmware.

 

Extra tough to know what state the router is in because the LEDs are burned out.

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#21
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-15 02:00:15
I love that you use nmap's OS detection so resourcefully (and intelligently!). I looked online to see if the c9's motherboard has flash reset pins, but it doesn't appear to. I'm not sure of what else to try. :-/
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#22
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Re:Archer C9 V1 Firmware Upgrade Brick
2020-01-15 17:30:07

@TNV 

 

If the serial number is not showing as valid, contact support as they can help add the serial number after verifying the device (copy of receipt, and picture of sticker with the serial number).

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#23
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