Rollingstone.com stopped rolling for several hours on Monday.

Internet security experts say that misconfigured DSL and cable modems are worsening a well-known problem with the Internet's DNS (domain name system), making it easier for hackers to launch distributed denial-of-service (DDoS) attacks against their victims.

NeuStar confirmed that its UltraDNS managed DNS service was knocked offline for several hours Tuesday morning by a distributed denial of service attack.

Researcher who found cache-poisoning flaw says time has come for DNSSEC technology

The Internet engineering community is grappling with what to do about a serious flaw in the DNS discovered mid-year, and the ongoing debate brings to mind a famous quotation from Voltaire: "The perfect is the enemy of the good."

Despite industry efforts to lock down DNS servers, one in four remain vulnerable to cache poisoning due to the well-documented Kaminsky flaw identified earlier this year and another 40 percent could be considered a danger to themselves and others, recent research shows.

One of China's largest ISPs (Internet service providers) has fallen victim to a dangerous vulnerability in the Internet's addressing system, according to security vendor Websense.

A year has passed since security researcher Dan Kaminsky disclosed a serious flaw in the DNS that makes it possible for hackers to launch cache poisoning attacks, where traffic is redirected from a legitimate Web site to a fake one without the Web site operator or end user knowing.