Last few days, was finding that many sites couldn't be accessed, with browser just saying "Resolving Host..." for a long time. It only worked on sites I'd visited very recently. Even trying to get to tpg.com.au I think the primary DNS is failing for some reason.   E.g. running this command at cmd prompt (.35 is primary DNS) >nslookup tpg.com.au 203.12.160.35 failed with: *** dns1.tpgi.com.au can't find tpg.com.au: Query refused   But this one (.36 being secondary DNS): >nslookup tpg.com.au 203.12.160.36 succeeded with: Non-authoritative answer: Name: tpg.com.au Address: 203.26.27.38   The Primary / secondary config (.35/.36 respectively) is just how the router was configured. Since it cam from TPG, I assume that's their settings. I resolved it by switching the primary/secondary around in router settings. Seems to work better now. ... View more