The web is not as wild as you may think
August 25th, 2010 by Simon McCallaYou might have read an article in The Independent this week about hacks on the domain name system and the seven “guardians” of the internet. There were a few points made that might cause confusion - we thought it might be helpful to clear them up.
The Domain Name System is not reliant on two servers in the US, and the DNS isn’t just based in the US. It is a highly distributed system with hundreds of root server instances around the world. As such, no one country ‘owns’ the domain name system or has access to turn it on or off. There are 13 logical root ‘servers’ which are actually hundreds of separate machines, and there are over 200 unique locations that contain one or more root nameservers.
While it’s true that a significant attack on the DNS could significantly damage the internet, this is the precise reason why the DNS was designed as it was. By distributing it across so many worldwide locations, it is incredibly difficult to bring down.
The Domain Name System is more vulnerable to social engineering than “hacks”. Rather than directly break into the DNS system, last year’s attacks on Twitter and Baidu were understood to be the result of technically simpler but still sophisticated “social engineering”:tactics targeted at the site registrars. Here, an operator at the registrar would have come under pressure via phone calls or emails to change the entry to an Iranian server - it is unlikely that any actual ‘hack’ took place. This is an approach that we have encountered before when criminals have targeted .uk sites. It just demonstrates how important human vigilance still is when protecting the infrastructure of the Internet, in addition to any other security measures that are in place. Nominet’s staff undergo rigorous training to ensure that the .uk DNS remains safe from these threats.
Bringing down the DNS is not straightforward due to its distributed, resilient infrastructure - so the Internet as a whole is unlikely to need “restarting”. The “7 Guardians” referenced in the article are actually there to support the security extensions to the domain name system called ‘DNSSec’ - which has been under developement for 10 years by the International internet community. In short, we have less reason to be concerned than you might otherwise have thought from reading the feature in the Independent. The web is extremely resilient and there is a big community of experts - in DNSSec, the registries, and beyond - working hard to ensure its ongoing stability.


