Detect DNSChanger and Notify Visitors
In the summer of 2012, the Internet Systems Consortium turned off the DNS servers previously utilized by the DNSChanger malware. CloudFlare developed this application to help alert affected Internet users, and link them to resources to correct their DNS settings to ensure continued Internet access.
The shut down date has long since passed, and this application has long since been removed from our platform. It is no longer maintained, and it does not meet our current guidelines for applications on our platform. For updated information on building applications, please visit the App Developer Documentation.
The original README continues below.
Using This Tool
The easiest way is to put your site on CloudFlare and go to https://www.cloudflare.com/apps/dnschanger_detector to enable the app.
How It Works
DNSChanger Detector works by attaching an alerting function to the window, and making a JSONP call to a special URL. The IP resolved for that URL by the infected servers serves a file that calls the alerting function.
For Non-CloudFlare Sites
CloudFlare is trying to make the Internet better for everyone.
The Federal Bureau of Investigation (FBI) has been operating DNS servers to keep infected users online, but they are going to stop soon (July 9, 2012). We want to do what we can to keep people from being kicked off the Internet when that happens.
For more background, see http://www.fbi.gov/news/stories/2011/november/malware_110911
This software is MIT licensed.