FreeGate is an anti-censorship software for secure and fast Internet access. It was developed and maintained by Dynamic Internet Technology Inc. (DIT: www.dit-inc.us), a pioneer in censorship-circumvention operation.
- users access web sites overseas as fast as their local ones;
- requires no installation or change in system setting;
- a single executable file on a Windows platform.
FreeGate works by tapping into an anti-censorship backbone, DynaWeb, DIT's P2P-like proxy network system.
FreeGate's anti-censorship capability is further enhanced by a new, unique encryption and compression algorithm in the versions of 6.33 and above.
Download the current FreeGate Client Software at
DynaWeb is a collection of anti-censorship services provided by Dynamic Internet Technology Inc. (DIT). DynaWeb is a web-based anti-censorship portal. Once users point their web browser at one of the DynaWeb URLs, a web page will be presented similar to the one at us.dongtaiwang.com, with most blocked websites as links. In addition, a user can type in any URL in the box on this page and DynaWeb will fetch the pages for him/her instantly. No software is needed, nor are any settings tweaked on a user’s computer. But since the Chinese net police watch DynaWeb’s portal websites closely and block them as soon as they identify them, DynaWeb must indeed be very dynamic. It has hundreds of mirror sites at anytime, and each with a varying IP and DNS domain name, to defeat IP blocking and DNS hijacking. On the backstage, DynaWeb also has mechanisms to proactively monitor the blocking status of each of its mirror sites, and as soon as blocking is detected, it will change the IP and DNS domain name instantly.
To keep users connected to such a dynamic infrastructure, DynaWeb has a variety of channels to keep users updated. For example, a user can send a message to one of DynaWeb’s instant messenger (IM) accounts, and will get an instant reply showing the newest addresses of DynaWeb portals. Similar things are being done with emails. By these many, dynamic channels, DynaWeb outsmarts any attempt to collect all DynaWeb addresses by the censors, because each user receives only a (different) subset of DynaWeb’s addresses. Automatic blocking detection combined with quick reaction apparently frustrates the blocking efforts on the China side of the GFW.
DIT also releases a tiny piece of software, FreeGate, which directly taps into DynaWeb’s backbone and keeps a user connected to the dynamic channels automatically. There are indications that FreeGate has some capabilities built-in to exploit some zero-day vulnerabilities of the GFW.
DIT was founded originally in 2001 to provide email delivery services to China for U.S. government agencies and NGOs. In 2002, DIT started to provide anti-censorship services under the framework of DynaWeb, and like UltraSurf, DynaWeb became a top contender of the GFW-penetration effort. The battle between DynaWeb and GFW has been thrilling, dynamic and dramatic, albeit largely invisible to the general public. Today DynaWeb offers the widest range of options for users to access Internet freely, and supports more than 50 million web hits per day on average from Chinese users alone.
In addition to its DynaWeb service, DIT has released numerous advisories and technical analyses of the evolving Internet censorship operations [http://dit-inc.us/press_release].
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