The latest stable release of Apache Traffic Server is 6.2.0, released on 2016-07-25. We follow the Semantic Versioning scheme. The goal is to release minor versions quarterly, and within the major version these are all compatible.

When downloading from a mirror, please be sure to verify the checksums and OpenPGP compatible signature. You can also browse through all releases and checksum signatures.

Current v6.x Release -- 6.2.0

Apache Traffic Server 6.2.0 was released on July 25th, 2016. [PGP] [MD5] [SHA1]

Traffic Server 6.2.0

v6.2.0 is our latest stable release. This is an LTS release. Additional details for this release are in the CHANGES log and the the Jira Release Notes.

For details on the v6.2.x release, please see 6.2.x News.

Current v5.x Release (Long Term Support) -- 5.3.2

Apache Traffic Server 5.3.2 was released on September 13th, 2015. [PGP] [MD5] [SHA1]

Traffic Server 5.3.2

v5.3.2 is our latest stable release, which is a bug-fix release over the previous release. This is of course compatible with all previoux 5.x releases as well. For details on the v5.3.x releases, please see 5.3.x News. Additional details for this patch release are also in the CHANGES log and the the Jira Release Notes.

Current v4.x Release (Long Term Support) -- 4.2.3

Apache Traffic Server 4.2.3 was released on February 3, 2015. [PGP] [MD5] [SHA1]

Traffic Server 4.2.3

This is primarily bug fix release since 4.1.2, but there is also a host of new features and minor improvements or cleanups on the code-base.

Upgrading from v3.2 to v4.x implies reinitializing the cache, so existing cache data will be erased. This should happen automatically on startup, but please be careful. For details on upgrading to v4.x, see these instructions.

More details are also in the CHANGES log and the the Jira Release Notes

Archived Releases

Apache Traffic Server Archive

Note: Upgrading from v2.0.x or v2.1.8 and earlier requires that you migrate to the new records.config configuration file. You should also clear all caches after upgrading (e.g. sudo traffic_server -Cclear), as well as deleting the hostdb files (var/trafficserver/host.db and etc/trafficserver/internal/hostdb.config).