源之原味

谷歌更新刚刚为反审查工具创造了一个大问题

 

抽象
Domain-fronting is now a thing of the past

这篇文章来自theverge.com。原文网址是: https://www.theverge.com/2018/4/18/17253784/google-domain-fronting-discontinued-signal-tor-vpn

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App developers won’t be able to use Google to get around internet censorship anymore. The Google App Engine is discontinuing a practice called domain-fronting, which let services use Google’s network to get around state-level internet blocks.

A recent change in Google’s network architecture means the trick no longer works. First spotted by Tor developers on April 13th, the change has been rolling out across Google services and threatens to disrupt services for a number of anti-censorship tools, including Signal, GreatFire.org and Psiphon’s VPN services.

Reached by 的边缘, Google said the changes were the result of a long-planned network update. “Domain fronting has never been a supported feature at Google,” a company representative said, “but until recently it worked because of a quirk of our software stack. We’re constantly evolving our network, and as part of a planned software update, domain fronting no longer works. We don’t have any plans to offer it as a feature.”

Domain-fronting allowed developers to use Google as a proxy, forwarding traffic to their own servers through a Google.com domain. That was particularly important for evading state-level censorship, which might try to block all the traffic sent to a given service. As long as the service was using domain-fronting, all the in-country data requests would appear as if they were headed for Google.com, with encryption preventing censors from digging any deeper.

While never an explicit feature of Google’s App Engine, domain-fronting had been widely publicized since it was publicly adopted by Signal in 2016. The technique was also used by state hackers: According to a recent FireEye report, the Kremlin-linked APT29 used domain-fronting to smuggle information out of targets for as long as two years.

Digital rights groups are already urging Google to reconsider the move.

“Google has long claimed to support internet freedom around the world, and in many ways the company has been true to its beliefs,” said Nathan White of Access Now. “Allowing domain fronting has meant that potentially millions of people have been able to experience a freer internet and enjoy their human rights. We urge Google to remember its commitment to human rights and internet freedom and allow domain fronting to continue.”

Update 9:45pm ET: Updated to include statement from Access Now

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