Tried all you suggested and got a sluggish load of some pages, but the rest failed. Then having lost patience I set up the Orange livebox and everything works fine. Could it then have been a faulty ro ...
When you enter the DNS servers in your router are you clicking "Apply" at the bottom of the page?
The other way is to open Network connections manually and put in OpenDNS servers.
I have a Netgear router and over the last couple of months since an Orange speed upgrade I continally lose access to all sites, which I can get via the IP addressed so obviously a DNS issue.
I've been using my Netgear DG834G router with Orange fine until they upgraded my speed. Oddly, my Internet connection will drop once a week or so...and i have no access, but when I enter the IP addres ...