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You are here: Wireless Wireless Reviews ASUS RT-N66U Dark Knight Dual-Band Wireless-N900 Gigabit Router Reviewed - Features

ASUS RT-N66U Dark Knight Dual-Band Wireless-N900 Gigabit Router Reviewed - Features

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ASUS has revamped its admin GUI for the RT-N66U with an updated look. But users of other ASUS routers will notice a similarity to some of the old GUI's features and organization. Logging into the admin interface for the first time launches a wizard (Figure 6).

You don't have an option to skip the wizard and it makes you enter a username and password, but allows you to continue to use the default (admin/admin). Detection of my DHCP WAN connection type was very quick.

RT-N66U Setup Wizard
Figure 6: RT-N66U Setup Wizard

Part of the wizard is wireless network setup. I chose to not enable wireless encryption because I wanted to test WPS. But when I attempted to connect to the router, my client didn't indicate that it had found a WPS-enabled router and just let me connect unsecured.

I found that the wizard had set the WPS mode to Configured, but with no security enabled. So I had to reset WPS to take it out of Configured mode so that my client could execute a WPS PIN session, which ran successfully.

To double check, I reset the router to factory default and attempted to connect a wireless client without running the Wizard first. The client properly started a WPS session, which concluded with a WPA2/AES connection.

After you complete the wizard, subsequent logins take you to the Network Map. The Map is a similar mechanism to ASUS' previous GUI, providing clickable shortcuts to key setup features. Figure 7 shows the Network Map after clicking on the Internet Status box, with the right-side box showing Internet Status.

Network Map showing Internet Status
Figure 7: Network Map showing Internet Status

Before diving further into the user interface, here’s a summary of the Dark Knight's features compiled from its data sheet and admin interface.


  • Static and Dynamic IP, PPPoE , PPTP, L2TP WAN connections
  • MTU/MRU adjust (PPPoE only)
  • DHCP Server w/ lease time setting, default domain and primary/secondary DNS
  • DHCP Client list
  • DHCP reservation
  • Multicast routing and forwarding
  • UDP proxy
  • Switch jumbo frame enable
  • UPnP enable/disable
  • IPv4 Static Routes
  • IPv6 support: Native; Native w/DHCP; Tunnel 6to4; Tunnel 6in4; Tunnel 6rd
  • DDNS support for,,,
  • Five level bandwidth-based QoS for upand download traffic.


  • Firewall enable/disable
  • DoS protection enable
  • Virtual Server/port forwarding for single or multiple ports with TCP, UDP or both protocols forwarded. Separate source and destination ports, not schedulable
  • Triggered port forwarding for single ports, TCP or UDP, not schedulable
  • URL keyword filter
  • Per client internet access scheduling
  • DMZ Host
  • RTSP passthrough
  • PPPoE relay
  • Ignore Ping Packet from WAN port
  • Outbound port filtering: black/white list with port range, source/destination IP, protocol and day/time filter


  • PPTP server
  • PPTP, L2TP,IPsec passthrough (default enable)


  • Remote Management with user configurable port (but no HTTPS)
  • Syslog server support
  • Command line interface via Telnet (default disable)
  • Reboot and reset to factory default
  • Save/restore settings
  • Logs: System console, DHCP, Wireless, port forwarding, routing table


  • WEP, WPA / WPA2 Personal and Enterprise (RADIUS) support
  • Wi-Fi Protected Setup (WPS) support, pushbutton and PIN
  • Auto, N-only, Legacy modes
  • Auto and manual channel set
  • Transmission rate set
  • SSID broadcast enable/disable
  • Radio enable day/time schedule
  • WDS bridging / repeating
  • Multicast transit rate
  • Transmit power adjust
  • Beacon period, RTS threshold, DTIM interval adjusts
  • Transmit burst (default enable), multicast forwarding (default disable), WMM APSD (default enable) enables
  • Wireless client isolation (from each other)
  • Scheduled wireless enable/disable
  • AP/router mode switch
  • Four Guest networks per radio
  • Wireless MAC address filtering (allow or deny based on MAC address)
  • WMM disable

The main omission from the list above is support for secure HTTPS admin access. This isn't that big a deal for LAN-based management. But you'd really want to have it for remote access. The ability to limit access to an IP address or range, which the 66U also doesn't have, would also be helpful.

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Slideshow: D-Link DIR-628 RangeBooster N Dual Band Router

User reviews

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Average user rating from: 15 user(s)

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Tomato bridge

Overall rating: 
Reviewed by Jason
May 15, 2014
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Was surprised it didn't have a bridge feature out of the box, but we planned on loading tomato anyways. Using it to bridge 60mb internet through two floors and it is working perfectly, nice steady connection.


Dead in less than 3 months! Deceitful customer service!!

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Reviewed by TomD
April 12, 2014
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Works fine for a little over 2 months. Woke one morning, no wifi on any device... AC adapter died. 1st ASUS tech: AC adapter is external accessory and not included in warranty. Go buy another AC adapter. 2nd ASUS tech: It's faster to go buy another AC adapter. Lots of blah blah blah showing a company that is full of deceits doing their best to not honor their warranty. Don't believe me? Try calling and tell them you have a dead AC adapter. Here's their number: 812-282-2787


Best choice in dual band 450 Mbps routers, and a few tips for optimum results

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Reviewed by Robbster
July 09, 2013
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Researched VERY carefully before choosing the Dark Knight as the foundation for home network upgrade. The primary goals for the upgrade were increased device to device speed and to enable a more robust file sharing and backup scheme. The Dark Knight reviewed the best, and has delivered on all these counts so far in my setup. BUT, you do have to master some aspects of the the configuration to get the most out of it. Specifically rejected the ASUS RT-AC66U and the draft 802.11AC devices generally as too immature. While I like *leading* edge and the promise of 802.11AC speeds (which will be fabulous when they are actually delivered reliably), it seemed that AC is on the *bleeding* edge right now based on device reviews and the status of the draft AC spec. So, Dark Knight it is!

Here is what I learned so far. Note that this is what works for me in my specific suburban home and neighborhood setting, and other environments will of course affect router function...

Who is this for?
*Tech savvy who want maximum performance at reasonable cost and with a pretty straight forward configuration process. I conclude this because, at the end of the day, I believe you have to dig into the configuration a bit to really get what you want from this router, BUT, fortunately, the Dashboard UI is pretty straight forward given the degree of flexibility built into this device.
*The less sophisticated user who still wants top performance. They can use the Quick Internet Setup to be up and running about as painlessly as is possible these days, and the defaults plus the raw capability of the device will give good performance. But they may not realize full benefits if they don't poke into the config, and at least run firmware updates.

Paired Adapter
TRENDnet 450 Mbps Dual Band Wireless N USB Adapter TEW-684UB (Black)
*Of course you have to pair the N66U with a similarly spec'd adapter, and the TRENDnet 684UB works great! Am getting full 450Mbps links speeds on 5GHz band, and 2.4GHz speeds in the 144-300 Mbps range despite the crowding in this band.

Router Configuration
*Update Firmware. Obviously for this router, regularly updating the firmware is important, and Asus makes this super easy right from the top of the main device screen (i.e., the Dashboard). I think it's really cool how Asus is working the firmware constantly with a community of users, and also supports open source firmware as well. Asus is easily the most responsive and proactive firmware developer I've ever seen in 20 years of working with wireless networks and routers. To me, this is a competitive advantage vs. the "few updates then done" approach of other vendors who leave us stuck with firmware issues as they move on to the next device.

*Crank the power. Once I made my way to the >Advanced Settings/Wireless/Professional/Tx Power Adjustment< setting and maxed it out (200mW), link speeds and connection stability went WAY up in my home. 5GHz connections benefited the most, going right up to link speeds of 450 Mbps a 3 rooms away, and 2.4GHz link speeds increased 50%.

*Allow 40MHz band width on 5GHz. The total bandwidth of 5GHz wifi is much greater than 2.4GHz, AND it's less crowded so far, so setting the router to use the higher capacity of a 40MHz connection maximizes speed on this band. >Advanced Settings/Wireless/General/Channel Bandwidth/20/40< I find that my router + adapter combination regularly bumps the 5GHz connection up to 40MHz channel bandwidth with the resultant link speed of 450Mbps.

Connected Dual Drive RAID1 USB Hard Drive = Cheap NAS
Vantec Dual 3.5-Inch SATA to USB 3.0 and eSATA with JBOD/RAID 0/1 External Hard Drive Enclosure (NST-400MX-S3R)
WD Red 3 TB NAS Hard Drive: 3.5 Inch, SATA III, 64 MB Cache - WD30EFRX
Popped two Western Digital RED 3TB drives (optimized for 24/7 NAS use) into the Vantec 400MX dual slot RAID enclosure, configured for RAID1, formatted the resultant RAID drive through direct connection to PC, then attached this to the USB port on the Dark Knight, and it was immediately recognized. Kudos to ASUS for firmware that now supports connected hard drives larger than 2TB! Accessed the new shared drive through \ as an address in a Windows Explorer window (not browser, the FILE explorer). Then added the USB drive as a Favorite in Explorer. Simple, fast access to shared file storage. Getting just 5MBps (40 Mbps) transfer rates to the attached RAID volume. Slowish, but useable. Tried streaming some AVCHD 1080p content from the drive and it worked perfectly, no stutters at all, so HD streaming from attached storage looks pretty good.

Summarizing Pros and Cons to date

+ Outstanding speed when combined with similarly spec'd adapter
+ Ability to bump up Transmit power makes for much better link speeds across typical house size.
+ Very powerful and flexible set of features/options, with an easy way to configure them through the Dashboard UI.
+ Easy storage attachment and access
+ Can stream HD from attached storage
+ Frequent Firmware updates with lots of user input to the process
+ Supports attached storage greater than 3TB, with GUID vs. MBR partitions.
+ Active user community online

- Slowish write speeds through network to attached storage. Wish for this to be de-bottlenecked somehow, either in firmware, QoS settings, or through faster connection from router to storage device.

Features I like but have not explored

* VPN, FTP, secure Internet access
* Apps for router
* Multimedia server/sharing
* UPnP integration, e.g., with DirectTV or AV Receiver

Will update as I learn more...

Highly recommended!

*******1/11/2012 update successful UPnP/DNLA access **********

Successfully connected to the attached drive on the router from both my AV Receiver Onkyo HT-S8409 7.1-Channel Network A/V Receiver/Speaker Package, and BluRay DVD player Panasonic DMP-BDT220 Integrated Wi-Fi 3D Blu-ray DVD Player. Accessed both videos and photos stored on the attached drive and displayed them on connected HD TV. So, the DNLA/UPnP features of the Black Knight router worked successfully with DNLA-enabled AV devices on my home network. Very handy!


Very Satisfied with this Router

Overall rating: 
Reviewed by Unknown
June 20, 2013
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This is one of the best consumer router ever . There are no connection drop outs and excellent design to blend into any home .



Overall rating: 
Reviewed by Steven Chorkley
April 21, 2013
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I have thousands of connections at one moment and the internet is always in use, either by my HomeServer downloading films or TV Shows or daily usage. Never had to reboot this router once! WiFi Coverage beats any router I have had including the RT-N56U!!!!!!!!

The router is capable of any tasks you need and the GRE port forwarding is welcomed!

I don't care how good you think your current router is, this router is still the best on the market!

I must mention though this is the first router I have spent more than £60, and I am now happy with my Home Network. Power line, WiFi and 10m of Cat Networking. (I don't dare rip the walls out of a 1700's listed building!!!!! And the house is to big for the WiFi signal to reach the hole building so Power Line must be used, although not as effective as it should be due to old wiring,

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