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Internet users in Northern California were unable to reach properties including Amazon omeprazole 20 mg cap.com and Amazon Web Services for a time Wednesday evening, as their DNS provider was targeted by a distributed denial-of-service attack. The attack came as North American consumers rushed to finish online shopping ahead of the end-of-year holiday season. Amazon Web Services (AWS) was the first to signal something was amiss. Its status page indicates that at 5:43 p.m. Pacific Time on Wednesday its staff was investigating reports of DNS (Domain Name System) resolution errors from customers trying to reach its S3 cloud storage service. The problem persisted until 6:38 p.m. Pacific Time, but in the meantime the S3 service continued to operate, AWS said. However, staff at Neustar, the owner of Amazon’s DNS provider UltraDNS, was aware of the problem around an hour earlier, at 4:45 p.m. Pacific Time. The company was able to analyze the attack pattern and take steps to limit its effects within minutes of identifying the problem, he said. The outage affected the e-commerce servers of parent company Amazon.com too, and many others: “Tons of sites are offline,” wrote Jeff Barr, Amazon Web Services strategist, in a Twitter message.