ASUS N16, N66U, AC66U Latest Firmware

High level outline of firmware upgrade process:

  • Download the firmware
  • Download Restoration Tool and N66U user manual
  • Enter the router into Rescue Mode
  • Prepare your computer
  • Firmware upgrade

Asuswrt-Merlin does not support anymore these routers, so others continue doing that.

Asuswrt-Merlin Changelog
380.70 (8-Apr-2018)
  - NOTE: This will be the final 380.xx release for
          all models.  The RT-N66U and RT-AC66U
          support will be dropped, and all other
          models have been migrated to the new gen
          branch, as of release 384.4.
          People who wish to keep getting updates for
          these two older models should look at the
          john9527 fork: 

Download firmware

Below is the link to the latest firmware, forked from Asuswrt-Merlin.

Download is shared on Microsoft OneDrive

Check @UpgradeMatrix.txt file which is available at the download folder. It describes migrations paths. I had Asuswrt-Merlin firmware, thus I had to use Restoration Tool to upload new firmware. I could not do that via Web Interface in my case.

And take an E build, which has latest software. The difference from L build is described at the end of matrix document.

Download Restoration Tool and N66U user manual

Download Restoration Tool from Asus RT-AC66U home page, latest is Version

Download user manual

Rescue Mode

Once all files are downloaded, enter router in the Rescue Mode.

It allows to upload new firmware from your computer. How to enter Rescue Mode, can be found in the user manual. But I’m pasting screenshot here.

Prepare your computer

Connect your computer to your router via cable. Connect to any of the four LAN ports. Other 3 LAN ports and 1 WAN port must be disconected from router. As well disconnect any USB device.

Your computer should have all other network adapters disabled except the LAN (cable) which will be connected to the router. As well disable proxy settings and dial-up connection if it is customized.

Set LAN settings on your computer

Firmware upgrade

Restoration Tool must be started only after router is in rescue mode and connected to computer via specific IP address.

Whole process can take up to an hour, so be patient.

Open Restoration Tool, select the new firmware. Firmware file must be unzipped before.

Firmware uploading

Firmware being written

Once the firmware is uploaded wait a bit, check the power light and do the Factory Reset. Migration to new fork and upgrade is successful.


New Firmware Version for Router ASUS RT-N66U

Asus RT-N66U Firmware version

Bugs fixed:
1. Upgrade OpenSSL library to 1.0.0q
2. Fixed CVE-201301813
3. Fixed the XSS vulnerability on page Main_Analysis_Content.asp
4. Added Movistar profile in IPTV setting page

ASUS RT-N66U not usable as torrent and DLNA server

Couple of main issues which makes ASUS router unusable as torrent client and media server for average or advanced users:

  1. DLNA server doesn’t auto-refresh contents of USB drive.
  2. Download Master as torrent client doesn’t have labeling or other content categorizing automation: movies, series, documentaries, which would allow to put downloaded files into separate directories on USB drive.

Process of downloading and watching movies

ASUS torrent DLNA process

What it means, let’s take couple use case examples:

One evening you decide to watch something new. You connect to download master, download new movie. Switch on smart TV, connect to ASUS DLNA server, navigate to download directory and….there is no new file which was downloaded just now. Then, you connect to ASUS router, go to “USB Applications” -> “Media Services and Servers” -> turno off and on again DLNA server just to force it refresh the content. When you turn of DLNA server, TV looses connection. So now you have to navigate one more time on TV to download directory and find the movie, which you just have downloaded.

You download some 10 documentary movies or series of 6 seasons with Download Master. All files are just downloaded into one directory. Then, when you want to watch any of these files, on TV you have to scroll every time through huge list just to find one. There is no even manual possibility of organization of downloads into categories.


DLNA server could have at least scheduled auto-refresh or monitoring capabilities

Download master should go open source as utorrent so that it had at least some basic necessary extensions and is more or less equal to other utorrent clients on the market.

To summarize, these where just two use cases where ASUS should do some improvements. In other uses cases utorrent client and DLNA server works perfectly well.


Manually Set-up USB Printer in Network on ASUS RT-N66U for Windows 7

How can I set the printer by Line Printer Remote (LPR)/Line Printer Daemon (LPD) in Windows OS with the ASUSWRT firmware of ASUS wireless router?

Note: If you have already installed the printer locally in your computer, right-click the printer icon then select Property > Port tab to add a standard TCP/IP port.

Click Add Port. Select Standard TCP/IP Port then click the New Port button. Refer to steps 5-8 for the setting procedures.

Add new printer:

1. Run the Add Printer Wizard from Start > Devices and Printers > Add a printer.

2. Select Add a local printer then click Next.

ASUS LAN Printer2

3. Select Create a new port then set Type of Port to Standard TCP/IP port. Click Next.

ASUS LAN Printer3

4. In the printer name’s IP address field, type the IP address of the wireles router then click Next.

ASUS LAN Printer4

5. Select Custom then click Settings.

ASUS LAN Printer5

6. Set Protocol to LPR. In the Queue Name field, type LPRServer then click OK to continue.

ASUS LAN Printer6

7. Click Next to finish setting the standard TCP/IP port.

ASUS LAN Printer7

8. Install the printer driver from the vendor-model list. If your printer is not in the list, select Have Disk to manually assign the driver’s location. In my case it is Samsung

ASUS LAN Printer8

ASUS LAN Printer9


ASUS LAN Printer10

9. Click Next to accept the default name for the printer.

ASUS LAN Printer11

  1. Printer sharing settings
    ASUS LAN Printer12

10. Click Finish to finish the installation process and exit the Add Printer Wizard.

ASUS LAN Printer13

Pasted from <>

New Firmware Version for Router ASUS RT-N66U

This version isn’t displayed when you check for updates from the router it self.

ASUS RT-N66U Firmware version
Bug fixed:
1. Fixed wireless network unstable issue when there are over 50 clients in MAC filer list.
2. Fixed OpenVPN UI issue. OpenVPN client shows disconnect but it still connect to VPN server.
3. Fixed the NTP sync error issue when manually assign the NTP server.
4. Fixed AiCloud compatibility issue when using IE11.
5. Fixed AiCloud UI issue when generating file share link.