China just blocked thousands of websites

The Chinese censorship authorities have DNS poisoned *, which means all subdomains of are blocked in China. EdgeCast is one of the largest Content Delivery Networks (CDN) in the world and provides its cloud services to thousands of websites and apps in China.

We have acknowledged all along that our method of unblocking websites using “collateral freedom” hinges on the gamble that the Chinese authorities will not block access to global CDNs because they understand the value of China being integrated with the global internet. However, we can now reveal publicly that the authorities are doing just that - attempting to cut China off from the global internet.

We have seen instances of “collateral damage” due to “collateral freedom” over the past few days and have received emails from some smaller website owners wondering why their non-sensitive sites are being blocked by the great firewall.

What's going on?

The disruption to EdgeCast’s service was noted by the company on their website on November 14, 2014, although we noticed a problem on November 12 and the first poisoning on the 13th. The company's status update still appears on their site:

Please be advised, we are experiencing issues with content delivery in the China region due to suddenly increased restrictions imposed by the Chinese Government. If you are receiving reports from end users not able to view content from within China, please contact our network Operations center to discuss the options available to you.

Screen Shot 2014-11-17 at 12.26.20.png

Some of the recent victims of collateral damage, all EdgeCast clients, include:

Sony Mobile’s global and Chinese sites are both blocked.

The Atlantic will, sadly, not be able to claim that their website was blocked due to the aggressive nature of their reporting on China.

The project website of Drupal ( is blocked. Drupal is used as a back-end framework for many websites worldwide. Administrators of those websites in China will face disruptions when trying to update Drupal or install extensions.

Firefox browser add-ons are another victim. Firefox's is hosted on EdgeCast. Firefox users in China will not be able to install any add-on for Firefox.

Gravatar is used by many websites to show profile images. The images are hosted on EdgeCast and any website that uses Gravatar in China will be displaying broken images. Here is what a typical Chinese user will see when accessing those websites.

Other blocked websites include and It is hard to tell what websites may be affected because different sites might have different elements (i.e. images) that rely on EdgeCast. Anybody who appears on the EdgeCast customer list is potentially affected. Some client names appear in the screenshot below.



The great firewall (GFW) is attempting to block access to our collateral freedom mirror sites, which are hosted in the global cloud infrastructure. GFW cannot distinguish traffic to our mirror sites and other traffic to the cloud provider which means that they cannot block access to our mirror sites without blocking access to the all sites hosted by the CDN. We are forcing the authorities to make a decision between allowing uncensored access to the global internet or blocking global CDNs all together, which will come at a significant economic cost.

In the case of EdgeCast, the authorities have chosen to block access to their service altogether and as a result, they have taken down tens of thousands of websites in one foul swoop. The blocking of such a considerable number of websites in one instance will likely result in significant economic loss as many businesses will be impacted.

EdgeCast was recently acquired by Verizon, whose board directors include senior executives from companies that have made significant investments in China including Royal Dutch Shell, Proctor & Gamble and Deere & Company.

If the authorities did not anticipate what damage the blocking of EdgeCast would inflict, they have likely been alerted by the many companies that use EdgeCast in China. This action comes at a bad time for the Chinese authorities. This week, they are hosting the World Internet Conference and the blocking of EdgeCast will likely be a hot topic of discussion. We call on the Chinese authorities to lift the restrictions on EdgeCast immediately.


EdgeCast removed the status update on its website, but have published a blog post about their current problems in China: 

We have been hearing from our CDN and Monitoring partners throughout the industry and our own customers that more sites, CDNs and networks are being filtered or blocked by the Great Firewall of China. This week we’ve seen the filtering escalate with an increasing number of popular web properties impacted and even one of our many domains being partially blocked… with no rhyme or reason as to why.

At Verizon EdgeCast we have put policies in place to help our customers mitigate the effects of this most recent filtering but expect this to be an ongoing issue for our customers seeking to reach Chinese users (users in China). For any customers who are seeing their delivery impacted, please log in to your EdgeCast portal. Here you will find instructions on your portal home page on how to best mitigate filtering or blocking.

For those of our customers who are frustrated by this, we share your frustration, as does the whole content delivery and hosting industry. Rest assured that we stay committed to work with our global ISP partners and do our best to mitigate the effects of these filtering policies to ensure a clear path to your users and customers in China.



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Thu, Aug 10, 2023

1.4 million people used FreeBrowser to circumvent the Great Firewall of Turkmenistan

Since 2021, the authorities in Turkmenistan have taken exceptional measures to crack down on the use of circumvention tools. Citizens have been forced to swear on the Koran that they will not use a VPN. Circumvention tool websites have been systematically blocked. Arbitrary searches of mobile devices have also taken place and have even targeted school children and teachers.

The government has also blocked servers hosting VPNs which led to “near complete” internet shutdowns on several occasions in 2022. Current reports indicate that 66 hosting providers, 19 social networks and messaging platforms, and 10 leading content delivery networks (CDNs), are blocked in the country. The government presumably is unconcerned about the negative economic impact that such shutdowns can cause.

Fri, Mar 18, 2022

Well-intentioned decisions have just made it easier for Putin to control the Russian Internet

This article is in large part inspired by a recent article from Meduza (in Russian).

Since the beginning of the war in Ukraine, Russian users have had problems accessing government websites and online banking clients. Browsers began to mark these sites as unsafe and drop the connection. The reason is the revocation of digital security certificates by foreign certificate authorities (either as a direct consequence of sanctions or as an independent, good will move); without them, browsers do not trust sites and “protect” their users from them.

However, these actions, caused - or at least triggered by - a desire to punish Russia for their gruesome actions in Ukraine, will have long-lasting consequences for Russian netizens.

Digital certificates are needed to confirm that the site the user wants to visit is not fraudulent. The certificates contain encryption keys to establish a secure connection between the site and the user. It is very easy to understand whether a page on the Internet is protected by a certificate. One need just look at the address bar of the browser. If the address begins with the https:// prefix, and there is a lock symbol next to the address, the page is protected. By clicking on this lock, you can see the status of the connection, the name of the Certification Authority (CA) that issued the certificate, and its validity period.

There are several dozen commercial and non-commercial organizations in the world that have digital root certificates, but 3/4 of all certificates are issued by only five of the largest companies. Four of them are registered in the USA and one is registered in Belgium.

Mon, Aug 03, 2020

Announcing the Release of GreatFire AppMaker

GreatFire (, a China-focused censorship monitoring organization, is proud to announce that we have developed and released a new anti-censorship tool that will enable any blocked media outlet, blogger, human rights group, or civil society organization to evade censors and get their content onto the phones of millions of readers and supporters in China and other countries that censor the Internet.

GreatFire has built an Android mobile app creator, called “GreatFire AppMaker”, that can be used by organizations to unblock their content for users in China and other countries. Organizations can visit a website ( which will compile an app that is branded with the organization’s own logo and will feature their own, formerly blocked content. The app will also contain a special, censorship-circumventing web browser so that users can access the uncensored World Wide Web. The apps will use multiple strategies, including machine learning, to evade advanced censorship tactics employed by the Chinese authorities.  This project will work equally well in other countries that have China-like censorship restrictions. For both organizations and end users, the apps will be free, fast, and extremely easy to use.

This project was inspired by China-based GreatFire’s first-hand experience with our own FreeBrowser app ( and desire to help small NGOs who may not have the in-house expertise to circumvent Chinese censorship. GreatFire’s anti-censorship tools have worked in China when others do not. FreeBrowser directs Chinese internet users to normally censored stories from the app’s start page (

Fri, Jul 24, 2020

Apple, anticompetition, and censorship

On July 20, 2020, GreatFire wrote to all 13 members of the Subcommittee on Antitrust, Commercial and Administrative Law of the U.S. House Committee on the Judiciary, requesting a thorough examination into Apple’s practice of censorship of its App Store, and an investigation into how the company collaborates with the Chinese authorities to maintain its unique position as one of the few foreign tech companies operating profitably in the Chinese digital market.  

This letter was sent a week before Apple CEO TIm Cook will be called for questioning in front of the Subcommittee on Antitrust, Commercial and Administrative Law. The CEOs of Amazon, Google and Facebook will also be questioned on July 27, as part of the Committee’s ongoing investigation into competition in the digital marketplace.

This hearing offers an opportunity to detail to the Subcommittee how Apple uses its closed operating ecosystem to not only abuse its market position but also to deprive certain users, most notably those in China, of their right to download and use apps related to privacy, secure communication, and censorship circumvention.

We hope that U.S. House representatives agree with our view that Apple should not be allowed to do elsewhere what would be considered as unacceptable in the U.S. Chinese citizens are not second class citizens. Private companies such as Apple compromise themselves and their self-proclaimed values of freedom and privacy when they collaborate with the Chinese government and its censors.

Mon, Jun 10, 2019

Apple Censoring Tibetan Information in China

Apple has a long history of censorship when it comes to information about Tibet. In 2009, it was revealed that several apps related to the Dalai Lama were not available in the China App Store. The developers of these apps were not notified that their apps were removed. When confronted with these instances of censorship, an Apple spokesperson simply said that the company “continues to comply with local laws”.

In December, 2017, at a conference in China, when asked about working with the Chinese authorities to censor the Apple App Store, Tim Cook proclaimed:

"Your choice is: do you participate, or do you stand on the sideline and yell at how things should be. And my own view very strongly is you show up and you participate, you get in the arena because nothing ever changes from the sideline."

In the ten years since Apple was first criticized for working with the Chinese authorities to silence already marginalized voices, what has changed? Apple continues to strictly follow the censorship orders of the Chinese authorities. When does Tim Cook expect that his company will help to bring about positive change in China?

Based on data generated from, Apple has now censored 29 popular Tibetan mobile applications in the China App Store. Tibetan-themed apps dealing with news, religious study, tourism, and even games are being censored by Apple. A full list of the censored apps appear below.

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Is it possible to use alternate DNS, or do they block it?

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