D-link router, Oops! The page you requested is not available fix

In ubuntu, this page can be fixed by

1. uncheck 'enable DNS relay'

2. flush dns

sudo apt-get install nscd
sudo /etc/init.d/nscd restart

3. if above can't be done unplug router for 1 min and reconnect

http://askubuntu.com/questions/414826/how-to-flush-dns-in-ubuntu-12-04

sudo /etc/init.d/dns-clean restart

sudo /etc/init.d/networking force-reload

sudo /etc/init.d/nscd restart

sudo /etc/init.d/dnsmasq restart

sudo /etc/init.d/named restart

sudo rndc restart     

http://forums.opendns.com/comments.php?DiscussionID=14212
using open dns