As Russians protested ‘Internet isolation’ last weekend, hackers launched DNS attacks against Yandex, exploiting flaws in the government’s censorship system

Several major Russian Internet companies, including Yandex and the news outlet RBC, suffered massive network attacks this week that were made possible by vulnerabilities in the system the federal government uses to block websites. Sources told RBC that the perpetrators carried out DNS attacks, hijacking domain name system servers and domain registrars to direct traffic away from legal websites, like Yandex, to IP addresses that have been blacklisted by Roskomnadzor, Russia’s state censor.