Firmware 1.22NA
1. Add Advanced DNS.
2. Change: CAPTCHA disable by default. (Users can enable from UI if desire)
3. Fixed: Potential security leak with CAPTCHA.
4. Fixed: Configuring Access Control rules wirelessly cause router to reboot.
5. Fixed: UPnP issue.
Note: This firmware does not allow downgrading to pre-1.2x.
This firmware along with other resources for this product can be found here:
http://www.dlink.com/products/?pid=dir-628&tab=3