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How to Save a bricked Buffalo WZR-HP-G300NH2 Router

I have an old WZR-HP-G300NH2 router.  The one I used before as a client bridge to expend Wifi coverage.

Recently, I tried to flash a new firmware to it through DD-WRT web flash interface. It failed after I started 10 minutes.

Then I tried to restart, 30-30-30 reset. Nothing happened.  It always goes to that continuously blinking on Diag LED (RED).  No matter how many minutes I wait.

So I thought it is bricked. Then I googled the situation. Finally, I got the answer that it is just Half-Bricked.  It means I still have a chance to save it.

Let me recorded what I did. Actually, I did two times all good. The first time I flash the OpenWRT firmware. The second, I use DD-WRT.

TFTP recovery

There are a lot of steps, please read carefully.

All the following working on my Windows 10 Pro.

1) Install a TFTP client.

I just enabled it from Windows 10 Features.

2) Disable all network cards of my Windows. Only enable ethernet card. Disabled the Windows system firewall.

Change IPv4 properties the IP to 192.168.11.2 with subnet mask 255.255.255.0, default gateway 192.168.11.1

3) One Lan cable, one end to the ethernet port of my computer, the other end to the LAN port next to the WAN port of the router.

4) Type route print to get a list of my NICs. Write down the interface number of the LAN card, in my case, it is 7.

5) Now type the following command to get the ARP bindings.

netsh interface  ipv4 add neighbors 7 192.168.11.1  02:AA:BB:CC:DD:1A

6) Run the following command. (before hitting the enter key, read the step 7)

tftp -i 192.168.11.1 put firmware-name.bin

firmware-name.bin is a fake name. Please see the last portion of the post about the firmware I used.
7) Look at the back panel of the router and hold the power plug and router.

Plug the power, watch the lights of the panel, they are all on, then all dark. The LAN port with cable is on, then off. ( Hit the enter Key now). There are only about 4 seconds for me to run the command. So I prepare the command before the step.

8) It is very fast, the firmware will be transferred successfully in a few seconds.

9) Wait at least 10 minutes for flashing the firmware.

10) The router will be restarted automatically.

11) I will remove the neighbors.

netsh interface ipv4 delete neighbors 7 192.168.11.1 02:AA:BB:CC:DD:1A

12) Remove the static IP of my ethernet card. Change it back to DHCP.

 

When my computer gets the IP address from the router. I enter 192.168.1.1 into the browser to config the router.

 

Appendix

OpenWRT 18.06.1

https://drive.google.com/open?id=1F4xS3-kKaVuPqUbuYoSLbffoe3YfSs1W

DD-WRT v3.0 r30356 std

https://drive.google.com/open?id=1CwWTNVIcXTxqSLyN7IwWFObUxpR3zCAJ

User Manual

https://drive.google.com/open?id=1iC_S87vCox84ECDA3pJYkYfPhc-3Tobm

How to enable SSH server in DD-WRT router

The router is Buffalo WZR-HP-G300NH2, flashed with DD-WRT v24-sp2 build 21676.

The SSH server settings is under Tab Services, Services.

dd-wrt-sshd-1

The section is called Secure Shell

dd-wrt-sshd-2

Select Enable for SSHd, keep the others as is. Then click Save and Apply Settings.

After that, you can use Putty to ssh to router. Let us have a look at my router.

dd-wrt-ssh-box

The login user name is root, not the one for web ui.

Password is the one to sign in web ui.

Firmwares of Buffalo WZR-HP-G300NH

I used Buffalo WZR-HP-G300NH router for years. From its original firmware to DD-WRT firmware.

I did flash the router from original firmware to dd-wrt v24sp2 14998 professional version and v24sp2 19484 beta version. Both are build for Buffalo, which with Buffalo logo on it.

Here is the screenshot of original firmware v1.65 come with the device. It is Buffalo own firmware.
wzrhpg300nh.v165

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Buffalo Nfiniti WIRELESS-N WZR-HP-G300NH2

I have a Buffalo Nfiniti WIRELESS-N WZR-HP-G300NH which I bought about one year ago. I also flash the router to DD-WRT firmware.
Now, since I moved to a townhouse, one router can not cover whole house. I need one more to extend the WiFi coverage.
So, I bought another Buffalo Nfiniti WIRELESS-N WZR-HP-G300NH at about $80.
This time, it is version 2. So called Buffalo Nfiniti WIRELESS-N WZR-HP-G300NH2. The main features are same, but shipped with DD-WRT firmware. The customized firmware for Buffalo.
I put the old one on the main floor, and connect it with cable modem as AP. The new router is configed as Client Bridge(routed), and in the basement.
AP, old router, connected all wireless devices. and also connect to the new router with full bandwidth.
New router wired connect PCs in the basement.

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Upgrade WZR-HP-G300NH to latest DD-WRT firmware

I have my WZR-HP-G30NH router running for more than 200 days without restart. As I mentioned I would upgrade the firmware to the latest one.
I have already use DD-WRT firmware. The version on my router was v24-sp2(02/24/10) std build13977. I check the router database, the latest I can use is build14896.
There are two types of files can be download from dd-wrt site.
Buffalo WZR-HP-G300NH: Special File for initial flashing buffalo_to_ddwrt_webflash-MULTI.bin
Buffalo WZR-HP-G300NH: Webflash image wzr-hp-g300nh-dd-wrt-webupgrade-MULTI.bin
The first one is used on the buffalo original firmware. Which can replace the buffalo firmware to ddwrt firmware.
The second one is to upgrade router which use ddwrt firmware already. It is for me.

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Running DD-WRT on Buffalo WZR-G300NH 227 days

I just checked my router, Buffalo WZR-G300NH, I bought it 10 months ago. I installed DD-WRT on it to replace the firmware build-in.
It is running smoothly over 277 days. Never re-boot during last 9 months.

So I would like to show off my ROUTER.

Look at the screen shot below of the dd-wrt infor page.

dd-wrt-WZR-HP-G300NH-status

The reason why the router can work for such long time is the CPU and Memory

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Buffalo Nfiniti WIRELESS-N WZR-HP-G300NH

Last week, I bought a Buffalo Nfiniti WIRELESS-N WZR-HP-G300NH at NCIX. It is $106.39 with tax.

This device is a router, wireless router, Access Point 802.11B/G/N Draft N Gigabit QoS USB NAS.

The features here:

  •   Designed to IEEE 802.11n Draft 2.0 specifications
  •   Wireless connections up to 300 Mbps*
  •   MovieEngine QoS feature to prioritize streaming traffic
  •   Built-in AirShare Storage USB 2.0 Port
  •   BitTorrent client
  •   Web Access remote Access
  •   Greater coverage compared to standard 802.11g
  •   Easy Setup with AirStation One-Touch Secure System (AOSS)
  •   Enhanced multi-level security with WPA2, WPA-PSK (AES, TKIP) and 128/64-bit WEP
  •   Simple Web Browser configuration, no drivers needed
  •   Includes external switch to change between router and access point modes
  •   Adjustable flip-up antennas
  •   True VPN End point
  •   Built-in 4-port Gigabit Ethernet 10/100/1000 auto-sensing switch for up to 4 simultaneous wired connections
  •   Built-in Gigabit WAN port

*300 Mbps is the maximum wireless signal rate derived from IEEE 802.11n draft standard 2.0 specifications. Actual data throughput and range will vary depending upon network conditions and environmental factors, including volume of network traffic, building materials and construction, and network overhead.

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