Feeds

UltraDNS back online after DDoS assault

Back off the canvas

The Power of One eBook: Top reasons to choose HP BladeSystem

A distributed denial of service attack knocked NeuStar's UltraDNS managed DNS service offline for several hours on Tuesday.

NeuStar runs high-availability DNS services for customers such as online retailers and IT giants, including Oracle and Juniper. In a statement, NeuStar told Networkworld that the attack affected only a small (unspecified) subset of its customers.

Early this morning [Tuesday], our monitoring systems detected a significant denial of service attack, which affected a small subset of our customers, in some cases for as long as a few hours. While we continue to investigate the cause, the extent, and the duration of the attack, service was completely restored by 10am EST.

Glitches in the UltraDNS services were first noticed by competitor Dynamic Network Services, which claimed sites including Amazon.com and SalesForce.com were affected by the outage.

"The Dynect Team quickly began to analyze the situation by checking the resolution chains for these popular web sites," said Tom Daly, chief technology officer at Dynamic Network Services. "Our analysis revealed that multiple UltraDNS PDNS (a special class of UltraDNS server) nodes were failing to respond to all DNS queries."

"When we were able to successfully query UltraDNS servers, responses were slow to come back, or largely timed out. The problem began to clear itself up around 10:00am Eastern, when we saw DNS responses returning quickly again," he added. ®

The Power of One eBook: Top reasons to choose HP BladeSystem

More from The Register

next story
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
BMW's ConnectedDrive falls over, bosses blame upgrade snafu
Traffic flows up 20% as motorway middle lanes miraculously unclog
LibreSSL RNG bug fix: What's all the forking fuss about, ask devs
Blow to bit-spitter 'tis but a flesh wound, claim team
Mozilla fixes CRITICAL security holes in Firefox, urges v31 upgrade
Misc memory hazards 'could be exploited' - and guess what, one's a Javascript vuln
Putin: Crack Tor for me and I'll make you a MILLIONAIRE
Russian Interior Ministry offers big pile o' roubles for busting pro-privacy browser
Manic malware Mayhem spreads through Linux, FreeBSD web servers
And how Google could cripple infection rate in a second
Don't look, Snowden: Security biz chases Tails with zero-day flaws alert
Exodus vows not to sell secrets of whistleblower's favorite OS
Researcher sat on critical IE bugs for THREE YEARS
VUPEN waited for Pwn2Own cash while IE's sandbox leaked
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.