By Will Stewart Russia was tonight hit by a massive internet meltdown. Vladimir Putin’s internet domain zone experienced massive failure leaving users unable to access numerous popular websites and applications, including giants like Yandex and Google. It was initially unclear if the failure was entirely domestic or an external attack. The cause of this disruption was initially identified as a breakdown in DNSSEC, the extension responsible for site authentication in the Russian internet, also known as RuNet. It came as Putin is seeking to isolate the Russian web from the West, limiting the ac…