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Google Public DNS and Location-Sensitive DNS Responses

Google Webmaster Central Blog - Mon, 2014-12-15 11:00

Webmaster level: advanced

Recently the Google Public DNS team, in collaboration with Akamai, reached an important milestone: Google Public DNS now propagates client location information to Akamai nameservers. This effort significantly improves the accuracy of approximately 30% of the location-sensitive DNS responses returned by Google Public DNS. In other words, client requests to Akamai hosted content can be routed to closer servers with lower latency and greater data transfer throughput. Overall, Google Public DNS resolvers serve 400 billion responses per day and more than 50% of them are location-sensitive.

DNS is often used by Content Distribution Networks (CDNs) such as Akamai to achieve location-based load balancing by constructing responses based on clients’ IP addresses. However, CDNs usually see the DNS resolvers’ IP address instead of the actual clients’ and are therefore forced to assume that the resolvers are close to the clients. Unfortunately, the assumption is not always true. Many resolvers, especially those open to the Internet at large, are not deployed at every single local network.

To solve this issue, a group of DNS and content providers, including Google, proposed an approach to allow resolvers to forward the client’s subnet to CDN nameservers in an extension field in the DNS request. The subnet is a portion of the client’s IP address, truncated to preserve privacy. The approach is officially named edns-client-subnet or ECS.

This solution requires that both resolvers and CDNs adopt the new DNS extension. Google Public DNS resolvers automatically probe to discover ECS-aware nameservers and have observed the footprint of ECS support from CDNs expanding steadily over the past years. By now, more than 4000 nameservers from approximately 300 content providers support ECS. The Google-Akamai collaboration marks a significant milestone in our ongoing efforts to ensure DNS contributes to keeping the Internet fast. We encourage more CDNs to join us by supporting the ECS option.

For more information about Google Public DNS, please visit our website. For CDN operators, please also visit “A Faster Internet” for more technical details.

Posted by Yunhong Gu, Tech Lead, Google Public DNS
Categories: sysadmin

How to block unwanted IP addresses on Linux efficiently

Linux Today - Mon, 2014-12-15 11:00

 xmodulo: You may want to block IP addresses on your Linux box under various circumstances.

Categories: linux, news, open source

We are never getting back to... Samsung's baking Apple's 14nm 'A9' chips?

The Register - Mon, 2014-12-15 10:59
Promise of 14nm has Cupertino back in Sammy's arms - reports

A new generation of smaller, faster Apple processors is now under production by Samsung, including at Sammy's Texan facility, according to reports.…

Categories: news

U.S. factory production accelerates in sign of economy's strength

Reuters: Technology - Mon, 2014-12-15 10:57
WASHINGTON (Reuters) - U.S. manufacturing output recorded its largest increase in nine months in November as production expanded across the board, pointing to underlying strength in the economy.
Categories: news

Why Didn't Sidecar's Flex Pricing Work?

Slashdot - Mon, 2014-12-15 10:48
Bennett Haselton writes Sidecar is a little-known alternative to Lyft and Uber, deployed in only ten cities so far, which lets drivers set their own prices to undercut other ride-sharing services. Given that most amateur drivers would be willing to give someone a ride for far less than the rider would be willing to pay, why didn't the flex-pricing option take off? Keep reading to see what Bennet has to say.

Read more of this story at Slashdot.

Categories: news

Private equity downs WAN furtler Riverbed in $3.6bn gulp

The Register - Mon, 2014-12-15 10:33
Thoma Bravo gives Elliott its payout

+Comment WAN optimiser and app speeder Riverbed is being bought by private equity house Thoma Bravo for $3.6bn.…

Categories: news

The best open source tutorials of 2014

Linux Today - Mon, 2014-12-15 10:24
Categories: linux, news, open source

Tax extenders expected to win U.S. Senate approval within days

Reuters: Technology - Mon, 2014-12-15 10:21
WASHINGTON (Reuters) - The U.S. Senate was expected this week to renew dozens of temporary tax breaks, known as the "extenders," including big ones for business research, wind power and foreign profits.
Categories: news

Small Bank In Kansas Creates the Bank Account of the Future

Slashdot - Mon, 2014-12-15 10:15 writes Nathaniel Popper writes at the NYT that the Citizens Bank of Weir, Kansas, or CBW, has been taken apart and rebuilt, from its fiber optic cables up, so it can offer services not available at even the nation's largest bank. In the United States the primary option that consumers have to transfer money is still the ACH payment. Requests for ACH transfers are collected by banks and submitted in batches, once a day, and the banks receiving the transfers also process the payments once a day, leading to long waits. ACH technology was created in the 1970s and has not changed significantly since. The clunky system, which takes at least a day to deliver money, has become so deeply embedded in the banking industry that it has been hard to replace. CBW went to work on the problem by using the debit card networks that power ATM cash dispensers. Ramamurthi's team engineered a system so that a business could collect a customer's debit card number and use it to make an instant payment directly into the customer's account — or into the account of a customer of almost any other bank in the country. The key to CBW's system is real-time, payment transaction risk-scoring — software that can judge the risk involved in any transaction in real time by looking at 20 to 40 factors, including a customers' transaction history and I.P., address where the transaction originated. It was this system that Elizabeth McQuerry, the former Fed official, praised as the "biggest idea" at a recent bank conference. "Today's banks offer the equivalent of 300-year-old paper ledgers converted to an electronic form — a digital skin on an antiquated transaction process," says Suresh Ramamurthi. "We'll now be one of the first banks in the world to offer customers a reliable, compliant, safe and secure way to instantly send and receive money internationally."

Read more of this story at Slashdot.

Categories: news

Turkey's Erdogan says media raids a response to 'dirty' plot

Reuters: Technology - Mon, 2014-12-15 10:10
IZMIT, Turkey (Reuters) - Turkish President Tayyip Erdogan on Monday defended weekend raids on media outlets close to a U.S.-based Muslim cleric as a necessary response to "dirty operations" by the government's political enemies, and told a critical European Union to mind its own business.

Categories: news

Drive-making kingpin WD gobbles Skyera... to give to HGST

The Register - Mon, 2014-12-15 10:03
Flash array packing density king bought

Rumour had it last month that WD was going to buy Skyera and rumour was right. WD subsidiary HGST is getting an early Christmas present with WD buying the all-flash array packing density king and assigning it to HGST.…

Categories: news

Iran's Rouhani says will try to clinch nuclear deal as talks with U.S. resume

Reuters: Technology - Mon, 2014-12-15 10:02
GENEVA/DUBAI (Reuters) - President Hassan Rouhani said on Monday that he would try to clinch a nuclear deal with world powers despite opposition from some quarters in Iran.
Categories: news

Red Hat Enterprise Linux 7.1 Beta is here

Linux Today - Mon, 2014-12-15 10:00

 ZDnet: Doesn't it seem like RHEL 7 just came out the other day

Categories: linux, news, open source

Sir Richard Branson Quietly Shelves Virgin Submarine Plan

Slashdot - Mon, 2014-12-15 09:33
An anonymous reader writes with news that Sir Richard Branson's goal of diving to the deepest part of the ocean has been put on indefinite hold. "Sir Richard Branson has quietly shelved his latest adventure: an ambitious plan to pilot a submarine to the deepest points of the world's five oceans. The entrepreneur had a grand scheme to explore both space and sea. But his plan for the first rocket ship charging passengers for trips to the edge of space is in jeopardy after the craft crashed during a test flight, killing a pilot. Now Sir Richard's dream of exploring the lowest points on Earth is also on hold. Virgin Oceanic's DeepFlight Challenger submarine was unveiled in a blaze of publicity in April 2011, with Sir Richard describing its mission as 'the last great challenge for humans.' He had hoped the 18ft-long submarine, designed to 'fly' along the ocean floor, would make its maiden voyage to the bottom of the Pacific's Mariana Trench – at a depth of 36,000ft, the lowest known point on Earth – by the end of 2011, or failing that, by 2012."

Read more of this story at Slashdot.

Categories: news

Next gen ransomware: Elliptic cryptic, talks on Tor, demands Bitcoin

The Register - Mon, 2014-12-15 09:28
All the gear and will cost you dear

Cybercrooks have brewed a strain of ransomware that uses elliptic curve cryptography for file encryption, and Tor for communication.…

Categories: news

U.S. manufacturing output surges in November

Reuters: Technology - Mon, 2014-12-15 09:17
WASHINGTON (Reuters) - U.S. manufacturing output recorded its largest increase in nine months in November as production expanded across the board, pointing to underlying strength in the economy.
Categories: news

European Commission updates its open source policy

Linux Today - Mon, 2014-12-15 09:00 The European Commission (EC) wants to make it easier for its software developers to submit patches and add new functionality to open source projects.

Categories: linux, news, open source

Vodafone poised to ink chumship pact with T-Mobile and get back into US enterprise

The Register - Mon, 2014-12-15 08:58
Just 900 customers need apply - NOT consumers

Vodafone is poised to do an MVNO deal with T-Mobile US to get back into the US market.…

Categories: news

Exploiting MS14-068 - just another pentest - Mon, 2014-12-15 08:55 This is a short post on how to exploit MS14-068 on Linux. This came up on my recent internal infrastructure engagement. The primary DC was a vulnerable Windows 2008 R2 SP1 server.
Categories: linux, news, security

Eric Schmidt: To Avoid NSA Spying, Keep Your Data In Google's Services

Slashdot - Mon, 2014-12-15 08:50
jfruh writes Google Chairman Eric Schmidt told a conference on surveillance at the Cato Institute that Edward Snowden's revelations on NSA spying shocked the company's engineers — who then immediately started working on making the company's servers and services more secure. Now, after a year and a half of work, Schmidt says that Google's services are the safest place to store your sensitive data.

Read more of this story at Slashdot.

Categories: news