I have noticed 3 significant problems with the website filtering on the DIR-655 using the firmware 1.32NA
These are my settings...
Website filtering: Allow computers access to Only these sites
Sites: 20 sites are listed in the format... blahblah.com
Access Control: Policy is Block some Access using machine MAC address with Apply Web Filter checked
Securespot: is not enabled
1. After you reboot the router, it allows access to every website. It only restricts access after you save settings on the website filter. If you have a power failure, you need to log back on the router and click on Save Settings under Website Filter.
2. Domain names over 39 characters are blocked, even if they are in your whitelist. Example: realpage.com is in the whitelist, www.realpage.com isn't blocked.... onesite.realpage.com isn't blocked... blahblahblahblahblah.onesite.realpage.com is

3. You can get around the filter by using https://. Example: wired.com ISN'T in your whitelist.... Open up your friendly browser and type in https://www.wired.com router whitelist = null
I'm giving up... unless there is a fix