Dns Attacks Remain A Problem

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IT departments are increasingly driven to more and more elaborate measures in an attempt to defend Domain Name System servers from attacks. It's a never ending effort that remains a necessity as long as the various forms of malware attack, such as phishing and pharming continue to pose a very real threat.

According to a recent survey of IT and business professionals by Mazerov Research and Consulting more than half claimed to have suffered a malware attack of some sort, just less than half reported pharming or cache poisoning and a third had experienced a Denial of service attack. In fact amongst all the respondents a mere 16 % claimed never to have experienced a malware attack of some sort. Indeed, of the various types of DNS attack malware came out as the most prevalent with 68%, ahead of denial of service, 48%; cache poisoning, 36% and pharming with 23%.

The prospect of an assault on a company's DNS servers is not a threat to be taken lightly. Should a DNS server be compromised a hacker would have complete control and therefore the ability to mislead surfers into all variety of phishing and pharming attacks. Understandably, companies are finding it necessary to employ fairly convoluted measures in attempt to defend DNS on average the typical number of overlapping methods used at the same time is 3.5 with the patching of operating systems emerging as the most popular option. Other means of protection might include dedicated Firewalls, DoS mitigation services, and various DNS appliances.

There was also an interesting conflict of opinions between the folks in IT and C-level executives. The survey asked how long they estimated their company could avoid serious issues should DNS go offline. The executive averaged 126 minutes whilst the IT people came up with a slightly less optimistic 105 minutes, although in some cases thought a mere 72 minutes would result in serious problems. The potentially damaging impact of a period of internet downtime to companies was made very clear - asked how their company would fare in the event of the internet connection being knocked out for a more significant period a rather shocking 12% thought it was extremely or somewhat likely they would completely go out of business.

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