Oct 27, 2017  After you download the crx file for UltraSurf 1.5.4, open Chrome's extensions page (chrome://extensions/ or find by Chrome menu icon > More tools > Extensions), and then drag-and-drop the *.crx file to the extensions page to install it.

10.02 / February 15, 2019; 22 days ago ( 2019-02-15) Available in English Website UltraSurf is a freeware product created by UltraReach Internet Corporation. The software bypasses and using an HTTP, and employs for privacy. The software was developed by Chinese as a means of allowing internet users to bypass the. It currently boasts as many as 11 million users worldwide. The tool has been described as 'one of the most important tools on the Internet' by, and as the 'best performing' circumvention tool by Harvard University in a 2007 study; a 2011 study by ranked it fourth. Critics in the community, George Turner Says, have expressed concern about the software's nature and alleged design; UltraReach says their security considerations mean they prefer third party expert review to open source review. Contents • • • • • • • • • • Overview [ ] In 2002, UltraReach was founded by Chinese dissidents in.

Shortly after, UltraSurf was created to allow internet users in China to evade government censorship and monitoring. As of 2011 UltraSurf reported over eleven million users worldwide.

During the Arab Spring, UltraReach recorded a 700 percent spike in traffic from Tunisia. Similar traffic spikes occur frequently during times of unrest in other regions, such as Tibet and Burma during the.

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In 2010 called UltraSurf 'one of the most important free-speech tools on the Internet' for enabling citizens to access and share information from oppressed countries during times of humanitarian or human rights crises. UltraSurf is funded, in part, through contracts with the U.S. Government's, which administers. As of 2012, UltraReach has had difficulty serving its growing user base due to insufficient funding. Operation [ ] Client software [ ] UltraSurf is free to download and requires no installation. UltraSurf does not install any files on the user's computer and leaves no registry edits after it exits. In other words, it leaves no trace of its use.

To fully remove the software from the computer, a user needs only to delete the exe file named u.exe. It is only available on a Windows platform, runs through Internet Explorer by default, and has an optional plug-in for Firefox and Chrome. The UltraReach website notes that 'Some anti-virus software companies misclassify UltraSurf as a malware or Trojan because UltraSurf encrypts the communications and circumvents internet censorship.' Some security companies have agreed to UltraSurf. According to Applebaum, the UltraSurf client uses techniques and also employs.

The client acts as a local proxy which communicates with the UltraReach network through what appears to be an form of /SSL. UltraSurf servers [ ] The software works by creating an encrypted HTTP tunnel between the user's computer and a central pool of, enabling users to bypass firewalls and censorship. UltraReach hosts all of its own servers. The software makes use of sophisticated, proprietary anti-blocking technology to overcome filtering and censorship online. According to Wired magazine, UltraSurf changes the 'IP addresses of their proxy servers up to 10,000 times an hour.'

On the server-side, a 2011 analysis found that the UltraReach network employed and software, as well as servers bootstrapping for a wider network of open recursive DNS servers, the latter not under UltraReach control. UltraSurf is designed primarily as an anti-censorship tool but also offers privacy protections in the form of industry standard encryption, with an added layer of obfuscation built in. UltraReach uses an internal content filter which blocks some sites, such as those deemed pornographic or otherwise offensive. According to Wired magazine: 'That's partly because their network lacks the bandwidth to accommodate so much data-heavy traffic, but also because Falun Gong frowns on erotica.' Additionally, the Falun Gong criticism website facts.org.cn, alleged to be operated by the Chinese government, is also unreachable through UltraSurf.

Evaluation [ ] In a 2007 study, Harvard University's found UltraSurf to be the 'best performing' of all tested circumvention tools during in-country tests, and recommended it for widespread use. In particular, the report found that UltraSurf effectively bypassed various forms of censorship and blocking, include IP block, DNS block, and keyword filtering. It was also the fastest tool during in-country tests, and was noted for being easy to use and install with a simple user interface. The report noted, however, that UltraReach is designed primarily as a circumvention product, rather than as an anonymity tool, and suggested that users concerned about anonymity should disable browser support for active content when using UltraSurf. A 2011 report by the U.S.-based human rights group ranked UltraSurf fourth overall among censorship circumvention and privacy tools, as measured by a combination of performance, usability, support and security. In particular, the tool was recommended for users interested in downloading or viewing information, who required a relatively high degree of privacy, and who favored a fast connection speed. Some technologists have expressed reservations about the UltraReach model, however.

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