ASUS RT-N66U – TomatoUSB firmware Flashing Guide

RT-N66U Dual-band 2x2 N900 Wifi 4-port Gigabit Router
DHCP reservation in the original firmware do not work really well. I have tried it several times with the same result. I ended up flashing the OEM firmware Yuck and that works, at least for the minimum of features. For feature rich firmwares like TomatoUSB, people found that they ran out of storage space when they enable more features. Login to your TomatoUSB web admin using a wired computer 2. And thanks VERY much shadowandy for the great write-up!!

Thanks shadowandy for sharing this info with us. Is it possible to save the original firmware to disk before flashing the new one? Press and hold the WPS button on the back while plugging in the power cable. Hold for 30 seconds and release the WPS button, the router will now boot.

Thanks for sharing your experience. I am sure one will panic if the web admin cannot be accessed. Nice guide used it on my new RT-N66U as the pppoe would not work this firmware solved the problem. To upload the firmware you need to hold down the reset button push the power switch on while holding down the reset switch down untill the power light starts flashing on and off.

To access the web interface after installing the firmware the Nvram must be cleared first. You do this by Pressing and hold the WPS button on the back while plugging in the power cable.

Hold for 30 seconds and release the WPS button. It will now reboot. I cannot put the router into the restoration mode. I followed the instruction in the article and in the message from Glenn Sullivan. None of them works. Here is what happens: Is this the signal for the restoration mode, the so called slow blinking?

This is all I get, anyway. Then I try a variety of possibilities: I tried releasing the reset button both before starting the flashing process and after that but, no luck. It scans for the router for about 30 secs and then gives the message that the router in not in restoration mode. Is there another way to flash the Tomato firmware? I have a Mac too and I have access to a terminal.

I finally got this thing working. I brought it in to work so that I could work on it in my down time. I think this is the only tutorial that I read that actually made it clear that to clear this out you need to hold down the WPS button for 30 seconds and NOT the reset button.

Thanks for the great advice. I would have hated to spend so much money with the promise of a custom firmware only to have to use the stock firmware. I just installed the tomato-K26USB It seem faster now with the Tomato one and easier to configure. I wander wy Asus dont come first with a firmware as good!

I finally managed to flash to Tomato. I was using a third party modified version of Asus firmware and apparently, it was allowing me to go to restore mode. I first switched back to an original Asus firmware and from there I was able to follow the instruction on this site.

If you can make this opiton possible I would be very happe. Can anyone confirm whether Parental Controls work on Tomato? Kids can still access the internet after hours. Did a quick test and it appears to work. Well, unless your kids are tech enough change MAC addresses on their devices. Worked on the first try without having to do anything beyond the instructions you wrote no setting ip address, performing ceremonial dances to appease the gods, etc….

Just in case anyone else has this questions: Just did the flash on the RT-N66R model, works great. I am having trouble logging back into user interface of the router. When the flashing is completed, i waited for 10 mins. The router seems not willing to reboot itself. And the power led stays ON. My connection icon on my computer shows no connect to the router. Can anybody let us know about 5Gz wireless option on rt n66u at tomato fw? On stock and Merlin Fw there are only 4 channels there to choose.

I do wonder what configuration options now you have? It is visible just on few devices as samsung galaxy s2 and dell xps studio lapt, but nobody else.

And I see last messages from ddwrt forum — they do have problems with 5gz either. What is the experience with 5Gz at you guys. Connecting only 1 Ethernet cable to my computer, I get the error: Couple of questions for clarification: Is there a link to describe what the different build types are?

The difference in the nonk and 64k is the amount of nvram set aside for saving the router settings. For feature rich firmwares like TomatoUSB, people found that they ran out of storage space when they enable more features. So it is better to install the 64k builds to avoid migration in the future. I had to reconfigure from scratch when I changed over to 64k builds.

For the features, he used to have a English site. Now is just Polish http: For me, I simply chose the AIO build. Your explanation of the 64k variant was helpful. Does anyone know if this firmware supports running OpenVPN on a separate guest network? As wyred detailed, I had an Invalid IP message when attempting to upload the firmware. The methods mentioned on timing recovery mode did not work for me.

What finally worked was to 1 put the router in recovery mode as mentioned above 2 reboot Windows 7. Did anybody tried to flash RT-n66u directly from Asus original firmware 3. Restart the restore utility. Mine appeared to still be trying to use a now disabled adapter. I managed to flash it in another way, via tftp from my Linux laptop.

Still, I need to be very fast. Since laptop connect to router with cable, while router is in maintenance mode, there is a very short time window when firmware can be uploaded. With Shibby fw is not a problem, as it is small for the moment, but Merlin is bigger, so I had couple of retries.

And, just to share a little bit of my experience: Hi, I am new to Tomato Shibby, but not to 3rd party firmware. I have used dd-wrt in the past. I had been running several stock firmware iterations in the past, all the way up to the latest 3. I rarely had any glitches with wireless connectivity. Since upgrading to tomato-K26USB I bumped up the transmission power from 42 to 80mW but still same.

The stock Asus firwmare was set to 80mW and again, wireless network connectivity was reliable. Nothing else has changed, just the firmware. Did I do something wrong?

Any help is appreciated. After installing Tomato, Parental Controls work the way they are supposed to. Everything is disconnected mid-stream. Same thing with ddwrt, as I have used that in the past on an older router. If you are using a Merlin build, please test it and if it works, I will gladly consider switching. The result was that the parental control works, meaning that the banned computer cannot access internet anymore.

I wonder if you tried exactly the same on stock firmware, as it supposed to work too… So, even the parental control is not very granular configurable, it seems to work fine. Try streaming both before the cut-off time, then see if they continue past the cut-off time. If they both stop, then Parental Controls are working. I wanted to try Tomato-Shibby for this very reason, which seems to have fixed the Parental Controls issue now as both streams stop at the cut-off time, but the wireless connectivity is occasionally intermittent on Tomato I am not sure if it is the TomatoUSB firmware issue but have you tried to baseline your wireless noise floor and choose a wireless channel that is less congested?

Hi shadowandy, no, I have not tried that but perhaps I should. Can you direct me on how to do that please? By the way, thanks for the awesome flashing instructions. To baseline or calibrate your wireless, we will need to measure the existing noise floor for the affected range — 2. To measure the noise floor, 1. Login to your TomatoUSB web admin using a wired computer 2. To choose a wireless channel that is less congested, 1. Click on the Refresh button 3.

If you are unable to locate an unused channel, choose a channel whereby most of the RSSI is in the range of to dBm. The more negative is that number, the weaker is the signal of others e. Thank you for these instructions but I am not sure what the objective is. Is the goal to change to a specific channel on my router? Right now Tomato24 is on 6 and Tomato50 is on Auto.

I got the floor as you suggested dBm. Not sure where to go from here. Also, someone on the Tomato Shibby General forum stated that the build that I chose might be unstable and suggested flashing an older build. Is there any truth to that? If so, how would I go about flashing to an older build, and which build should I choose? Would I use the same process I used to flash from the Asus stock firmware to the build I have now?

The objective is to measure the wireless interference in your area and hopefully get the software to work better by taking account of the surrounding noise. Thank you very much for your help. As with dd-wrt, the process works smoothly when performed from an XP OS. That was before I installed the firmware. The firmware version on my router is Tomato Firmware 1. So Yes or No? And if yes, then how? The simple guest account requires only the virtual wl0. For my guest wireless, I had created: My wireless clients could connect, get a DHCP address in the vlan on the separate subnet but there was no internet access.

I assumed that to be a routing or gateway configuration problem but I was not able to resolve the issue. You have a interesting set up. IP address of actual gateway Subnet mask: This routing rule is suppose to route all traffic on the new interface to the next hop your actual gateway. Try if it works. If it have internet access, I suspect your guest wireless might be able to reach out to your non-guest segment via your actual gateway.

It might be a security concern. I ask because the factory firmware has a tendency to randomly disconnect hard drives I verified many people were having this issue via Google search. It does hold an IP belonging to the same subnet as the gateway right? Just trying to figure out how it is routing.

My intent is to make it a router for your guest lan while still remaining as an AP for your regular non-guest wireless. Not pretty sure if it is achievable. For the harddisk, the disconnection could be due to some firmware spinning down the disk when there are no activities.

I vaguely remember that TomatoUSB has got this feature. Do experiment with this feature to see if it solves your issue. Cannot really help on this issue as I am not using this feature. I have direct access as usual. That is other than we I tried your suggestion. I did play around with this in the past too but I stopped after I accidentally blocked myself out and had to reset the router, ha-ha!

Thank you for this page! I had very slight differences with the procedure described:. I did not receive a prompt about incompatible firmware. Keep holding the reset button until the power led starts to flash on and off. When power led starts flashing, release the reset button and proceed.

When I powered on the router with the reset button held down, my power light never started flashing. The Restoration utility seemed to immediately recognized it was time to go and did something. If I wanted to go back to stock, I have to go through the restoration method, correct? I cannot upgrade to stock direct from Tomato.

Yes, you are right. You will need to go through the restoration method as it is the safest. You settings will be lost so do make a note of any special settings you have e. I followed the instructions I found here, and everything proceeded as outlined except I was never advised that the firmware was incompatible. I have tried it several times with the same result.

I also tried to reload the stock firmware with the same result: I tried both via the asus utility and the web interface. To make matters even worse, I cannot connect to the internet any longer. Any idea where I can start to fix this? If I can still upload to the router through the utility, is there hope? Is there a way to log the full url of Web traffic on my network running Tomato on this device?

I see a list of accessed domains but not the full url request. I just could use the webservice on Also thanks to posters Glenn Sullivan and Mike Jones for their information. I was using tomato-K26USB Output power on wifi limited in europe for max mWatt. And it is limited in new original firmware. Firewall features are no different. Flashing back to original firmware uses the firmware restoration application too, instead of pointing it to a tomatoUSB firmware, you use the original ASUS firmware.

I really like what you guys tend to be up too. This kind of clever work and reporting! I did all these below. I did not see any warning about error firmware. Few minutes later I use the address on 4 and it work. For win7 x64 i get it to work by running restoration util in Win XP compatibility and than selecting Run as Admin.

Thanks for the tips. The windows compatibility mode does help for apps that do not run in bit environments. Video playback is now smooth and flawless.

Any ideas why my connection speeds have been slaughtered? Bricked my router with the 64k tomato flash and have not been able to fix it.. I started the latest version of merlin firmware.. Umm… Use the Asus recovery tool and you will be good. Caution need to be taken when flashing between 3rd party firmwares. In your case, from asuswrt-merlin a 3rd party firmware to tomatousb another 3rd party firmware.

This guide is more targetted at those flashing from stock firmware. When flashing from 3rd party firmware to another, it is important to clear the nvram. You can do it via key presses and then use the recovery again to flash the 3rd party firmware. Otherwise, you can restore to stock firmware, completwly erase nvram, then install the new 3rd party firmware via recovery.

Thanks for sharing your experience of flashing from asuswrt-merlin 3rd party firmware to tomatousb 3rd party firmware. The set of instructions have been written sometime ago for flashing stock ASUS firmware to tomatousb 3rd party.

Download Master can also download files while a PC is turned off, and allows you to manage and monitor download status remotely. Support f or a massive data pipeline of up to , data sessions means the RT-N66U has around 20 times the networking capacity of other conventional routers for exceptionally smooth performance. Share your internet connection with your guests with no need to share your personal password or network resources. ASUS Guest Network supports up to three separate guest networks, each with its own usage limits and password.

Guests cannot access your primary network or any other connected devices. Learn more about updating new firmware. Power Wireless Router Satisfaction Report, based on 2, responses from 8 companies measuring satisfaction with wireless routers surveyed November-December Your experiences may vary. Consistently Praised for Networking Excellence!

Get Online in 30 Seconds Smart auto-detection design makes it possible for you to go from first plugging in the RT-N66U to setup completion in 30 seconds! Optimize Your Network for You Do you game a lot, or spend most of your time streaming videos? Powerful Online Multitasking up to , Data Sessions Support f or a massive data pipeline of up to , data sessions means the RT-N66U has around 20 times the networking capacity of other conventional routers for exceptionally smooth performance.

Dedicated Wi-Fi for Your Visitors Share your internet connection with your guests with no need to share your personal password or network resources. Discover more Wireless N solutions. All specifications are subject to change without notice. Please check with your supplier for exact offers.

Products may not be available in all markets. PCB color and bundled software versions are subject to change without notice. Brand and product names mentioned are trademarks of their respective companies. Actual data throughput and WiFi coverage will vary from network conditions and environmental factors, including the volume of network traffic, building material and construction, and network overhead, result in lower actual data throughput and wireless coverage.

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