How to work around DNS (Domain Name System) outages.
Soldiering on during a large scale DDoS (Distributed Denial of Service) attack on the web's DNS
March 27, 2013
The DNS is used by a web browser to translate a host name to a IP address, which is a bit like using a phone book to look up a person's phone number.
There are a number of ways of working around a DNS outage:-
Change the DNS servers used