Apache Traffic Serverâ„¢ software is a fast, scalable and extensible HTTP/1.1 and HTTP/2.0 compliant caching proxy server. Formerly a commercial product, Yahoo! donated it to the Apache Foundation. Here's a Traffic Server overview.

  • Caching

    Improve your response time, while reducing server load and bandwidth needs by caching and reusing frequently-requested web pages, images, and web service calls.

  • Proxying

    Easily add keep-alive, filter or anonymize content requests, or add load balancing by adding a proxy layer.

  • Fast

    Scales well on modern SMP hardware, handling 10s of thousands of requests per second.

  • Extensible

    APIs to write your own plug-ins to do anything from modifying HTTP headers to handling ESI requests to writing your own cache algorithm.

  • Proven

    Handling over 400TB a day at Yahoo! both as forward and reverse proxies, Apache Traffic Server is battle hardened. Also visit our Customers page 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 how to ask good questions, create useful bug reports and how to apply patches.

  • Subscribe and help out on the users Mailing List or simply share your usecase or experience. For (hopefully) speedier responses check out our IRC channel #traffic-server 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 how to create patches to the code or the documentation and how to debug Apache Traffic Server.

  • We've tagged github issues that have a low entrance barrier.

  • September 7, 2017: The first patch release for the v7.1 LTS train is now available to. There are no new features in this release, it's a bug fix release only. Download ATS v7.1.1 from the normal download mirrors now!
  • Aug 10, 2017: The latest LTS release, v6.2.2, is now available from the Downloads section. This is the LTS release for 6.x
  • July 24, 2017: We are very proud to announce the immediate release of v7.1.0, which is now available from the Downloads section. This is an LTS release, supported until 7/2019.
  • Jan 20, 2017: The latest LTS release, v6.2.1, is now available from the Downloads section. This is the LTS release for 6.x
  • Nov 7, 2016: We are happy to announce our next major release, v7.0.0! This release includes HTTP/2 Push and many other features and bug fixes.
  • Archived News