The partly state-owned bank and the website of the national lottery, Norsk Tipping, both fell victim to denial of service attacks, continuing a trend that has hit a number of Norwegian sites in recent weeks.
By flooding the sites with data, the denial of service attacks overpowered the companies’ servers, resulting in error messages for customers.
“Our IT people and experts from [IT services firm] Evry have sat down together and found the reason DNB.no was down this morning,” said DNB spokesman Thomas Midteide.
“It was blamed on a so-called denial of service attack. Putting it in layman’s terms, this means our servers were bombed with requests, clogging everything up. Norsk Tipping has been exposed to the same thing.”
Midteide said the bank’s servers were back up and running at 11am.