Open AirPort Utility for Windows
Click on the AirPort router to select it
Click Manual Setup
Click the Advanced (gear icon) button near the top of the AirPort Utility window
Click the IPv6 tab that appears just below Advanced
Make sure that the setting for IPv6 Mode is set to Link Local Only
Click Update at the lower right of the window, and allow a full minute for the AirPort to restart

Some Apple routers require modification of their settings in order to access the Winston dashboard at 

1) Click the icon representing Airport

2) Click Edit

3) Select the Internet tab

4) Under Primary DNS Server 

enter and click Update

Additional Option: Bridge Mode to avoid Double NAT

With Winston installed, AirPort will offer a warning that your system has Double NAT. You can set the AirPort into Bridge mode to remove a layer of NAT.

In addition to the steps listed above, under the Network tab set Router Mode to Off (Bridge Mode) and click Update.

Note: Winston has a DHCP Server and will serve addresses to devices connected to the AirPort after changing to Bridge mode. 

Note: DHCP mode (NOT Recommended)

In the event you have a unique setup and need DHCP mode, note that Apple AirPort routers prevent resolution of the Winston dashboard while in "DHCP and NAT" mode but works fine in "DHCP" mode. To update the mode on an Apple AirPort:

1) Select the Network Tab

2) Select "DHCP only" and click Update

Note: We do not recommend DHCP only, because it does not allow a proper range of IP addresses. Winston will assign to your AirPort, and then you can only select AirPort to serve