Denial of Service Attack Hits Amazon, Twitter, Others
October 21 2016 - 9:10AM
Dow Jones News
Several websites including Twitter and Tumblr were unreachable
for many internet users Friday morning following an online
attack.
Web technology provider Dyn said its domain name system, or DNS,
service was subject to a massive distributed denial of service
attack. Denial of service attacks can knock websites offline by
flooding them with junk data, blocking the way for legitimate
users. Dyn's DNS services are a key part of the digital supply
chain that allow web addresses—Twitter.com for instance—to take
users to the infrastructure that hosts them.
"We began monitoring and mitigating a DDoS attack against our
Dyn Managed DNS infrastructure" beginning at 7:10 a.m. Eastern time
on Friday, the Web service said on its status website. "Some
customers may experience increased DNS query latency and delayed
zone propagation during this time."
Amazon.com Inc. also said it was investigating the cause of DNS
problems affecting its East Coast cloud customers. In a note on its
status dashboard, Amazon said it was looking into an elevated
number of errors related to accessing its cloud services in a main
East Coast server hub due to DNS issues. Amazon Web Services runs a
broad array of websites.
Cloud services provider Heroku Inc. also said that it was seeing
"widespread" DNS issues related to a denial of service attacks
against one of its DNS providers.
Austen Hufford contributed to this article
Write to Drew FitzGerald at andrew.fitzgerald@wsj.com
(END) Dow Jones Newswires
October 21, 2016 09:55 ET (13:55 GMT)
Copyright (c) 2016 Dow Jones & Company, Inc.
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