Saturday, 23 August 2014

DNS lookup error, or how I lost 4 hours

Well, thanks to BTs so called broadband, 4 hours of my life are gone forever.  It looks like BTs DNS wasn't working, or the router hadn't been updated with a valid address.  This did several odd things 1. IE and chrome only served up pages from google, but wouldn't follow links.  Oddly pinging did a DNS look up ok (perhaps US use a different DNS) 2. A lack of DNS meant that norton Internet antivirus took about 50% CPU trying to phone home (a guess). Tried a DNS cache flush, plus an IE reload, and messing with Norton settings
A router reboot fixed the problem.
The system settled down after that and Norton took very little cpu - say 5%.

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