Howto replace the KPN Experia Box v8 with an Asus RT-AC66U

I am using a KPN 100Mb/100Mb fiber connection at home. I am very happy with it, except for the KPN Experia Box v8. I bought a Asus RT-AC66U Gigabit router to replace it. When I bought it, a year ago, it was in the top of all Gigabit router charts.

First I tried to replace the KPN Experia Box by using the pre installed firmware on the Asus RT-AC66U. That didn’t work. Then I tried to use DD-WRT, and after a lot of tweaking, it worked almost. My phone and TV worked OK, but my Internet connection didn’t. After rebooting, I lost a lot of settings.

Then I found the solution. I installed Tomato Version 1.28 by shibby, Tomato Firmware 1.28.0000 MIPSR2-121 K26AC USB AIO-64K to be exact. You can download it at This version does everything what is needed, and it is a lot faster than all other firmwares available (faster in saving and activating settings). Please note: Your KPN Experia Box will still be needed when you are using an analog phone line!

This is the install instruction you can follow. Connect your PC directly to one of the LAN ports of the Asus device.

1. First install the firmware. I assume that you can find out this yourself.

2. Write down the MAC address from your KPN router. You will need this here.

3. Login on the router, mostly on with username root and password admin (my suggestion is that you change that password right away)

4. Change the basic network settings

  • Choose type “PPPoE”
  • Choose username “XX-XX-XX-XX-XX-XX@direct-adsl” where XX-XX-XX-XX-XX-XX is your Mac Address from your KPN Router
  • Choose password “KPN”
  • Fill in the settings at the LAN Settings (see the screenshot for a working suggestion). The “IP Address” you are using will be needed later. (I am using this IP settings because I can switch back to my old setup fast when needed)
  • Click “Save”


5. Clone your Mac Address

  • At “WAN Port”, fill in the MAC Address from your KPN Router, use this format: “XX:XX:XX:XX:XX:XX”, and click “Save”


6. Reboot your router, wait for a minute or 3, and logon again, now using the IP Address you earlier added at the “LAN” section of the “WAN/Internet” screen. In my case:

7. Setup your VLAN Settings, using the exact settings in the picture below, and click “Save” after adding the settings.


8. Now you can shutdown your router, using the menu.

9. Connect your router, and please note that the ports displayed on the screen are in the opposite order (so 1=4, 2=3, 3=2 and 4=1)

  • The UTP cable from your Fiber Modem goes into the WAN port
  • On port 4 (port 1 in the picture above) you connect your TV device
  • On port 3 (port 2 in the picture above) you connect your KPN router (to the WAN connection on the KPN router)
  • On port 2 (port 3 in the picture above) you connect your Internal Network
  • On port 1 you can add an extra TV device if needed.

10. Now turn on your router and enjoy! You can change all other settings now, like Wireless, port forwards etc!