Apache Traffic Server™ software is a fast, scalable and extensible HTTP/1.1 compliant caching proxy server. Formerly a commercial product, Yahoo! donated it to the Apache Foundation, and it is now an Apache TLP. Here's a Traffic Server overview.
Important security announcement: All versions of Traffic Server prior to v3.0.4 and v3.1.3 have a vulnerability where a large Host: header can crash the server under certain conditions. Everyone is encouraged to upgrade as soon as possible. For more details, see CVE-2012-0256. New releases addressing this issue are available on the Download page.
Improve your response time, while reducing server load and bandwidth needs by caching and reusing frequently-requested web pages, images, and web service calls.
Easily add keep-alive, filter or anonymize content requests, or add load balancing by adding a proxy layer.
Scales well on modern SMP hardware, handling 10s of thousands of requests per second.
APIs to write your own plug-ins to do anything from modifying HTTP headers to handling ESI requests to writing your own cache algorithm.
Handling over 400TB a day at Yahoo! both as forward and reverse proxies, Apache Traffic Server is battle hardened. Also visit our Customers page (see link above) for some of our corporate users and supporters.
Having trouble with builds, configurations or are you getting errors you don't understand? Subscribe to our Users Mailing List or join our #traffic-server channel on irc.freenode.net to get help!
Can't get your plugin to work? Get help from developers or start a discussion on our dev discussion list.
Report or confirm bugs or try out the latest patches from our Bug Tracker
Learn here how to ask good questions, create useful bug reports and how to apply patches.
Subscribe and help out on the users Mailing List or on the #traffic-server channel on irc.freenode.net.
Impress developers or help others by participating on our dev discussion list or follow the latest development on our commits list.
Report issues or bring patches to our Bug Tracker
Visit our wiki to see a list of Projects we are currently working on.
Learn here how to create patches to the code or the documentation and how to debug Apache Traffic Server..
Or just fix a random bug!
Installing, configuring and administrating Apache Traffic Server
Developing Apache Traffic Server plug-ins and how the code works
A running list of your most common questions