Varnish HTTP Cache

I’m new here, please explain this Varnish thing

Questions and Answers

What is happening

2018-11-12 - Varnish 6.0.2 released, official Long Term Support

We are happy to announce the release of Varnish Cache 6.0.2.

This release is recommended for everyone running 6.0, and it contains many bug fixes and some new features.

At the same time we bring you the news that that 6.0 will maintained much longer than other Varnish Cache Releases, and that new repositories, Varnish 6.0 LTS, are introduced.

If you are currently using official packages, you need to change to the new LTS repositories to get 6.0.2. Please follow the instructions on the release page to set up the new repository for your platform.

The packaging of this release differs slightly from previous Varnish versons. This is described in the upgrading notes for 6.0. These changes were originally intended for the initial 6.0 release, but unfortunately they did not make it into the 6.0.0 or 6.0.1 packages.

At some point the previous LTS, Varnish 4.1, will reach its End of Life. It was first released in September 2015, and now is the time for users to start upgrading to Varnish 6.0 LTS.

If you are still using Varnish 4.1, you should be able to migrate to 6.0 without touching your VCL. In our experience so far, upgrading is very straightforward.

Read more about upgrading and what’s new in Varnish Cache 6.0.

2018-10-26 - Bug fix release: Varnish 6.1.1

We are proud to release Varnish Cache 6.1.1 to the world.

This release is recommended for everyone running 6.1, and packages are available from the official repositories. There are no new features in the release, and no reconfiguration is necessary.

Read more about Varnish Cache 6.1 here

2018-09-17 - Varnish 6.1.0 is released

Come and get it… Varnish Cache 6.1.0

This release brings many improvements under the hood with no need for reconfiguration for practically all users.

Read more about it here

2018-08-29 - Maintenance release: Varnish Cache 6.0.1

Today we made Varnish Cache 6.0.1 available on the download page and the official package repositories.

This maintenance release is recommended for all users of 6.0.0, and contains many bug fixes. More information is available in the Change log

2018-06-08 - Publically available packages from UPLEX

The varnish-cache contributors from UPLEX are happy to announce an alternative source for varnish binary packages for Debian, Ubuntu and RHEL/CentOS (work in progress).

Debian/Ubuntu packages are based on fairly recent varnish-cache master snapshots and are expected to be updated on a bi-weekly basis, synchronized with the official varnish-cache weekly builds.

The main purpose of the UPLEX Packages is to provide simple and efficient access to up-to-date varnish builds and a matching range of additional vmods which are not commonly found in package repositories like blobdigest, re, re2, geoip2 and dcs in addition to the varnish-modules vmod bundle. Other will be added over time.

This packaging effort is still in its early stages and will grow over time.

2018-04-26 - Maintenance release: Varnish Cache 4.1.10

This maintenance release is recommended for all users of 4.0 and 4.1 versions, and contains several bug fixes. More information is available in the Change log

2018-03-15 - Varnish 6.0.0 is released

Come and get it… Varnish Cache 6.0.0

Now with support for Unix Domain Sockets, better HTTP/2 support, many bugfixes and … Well read more about it all here

2017-11-15 - Security Advisory: (Unlikely) data leak

Certain uncommon configurations of Varnish may leak data in synthetic responses from vcl_backend_error{}

Please see VSV00002 Data leak - ‘-sfile’ Stevedore transient objects

We have released Varnish Varnish Cache 4.1.9 and Varnish Cache 5.2.1 to fix this issue.

2017-09-15 - Varnish 5.2.0 is released

Come and get it… Varnish Cache 5.2.0

2017-08-02 - Security Advisory: Denial of Service

All varnish versions from 4.0.1 are vulnerable to a Denial of Service attack, please see VSV00001 DoS vulnerability

2017-08-02 - Security releases: 4.0.5, 4.1.8 and 5.1.3

Varnish versions 4.0.5, 4.1.8 and 5.1.3 are now available. See VSV00001 DoS vulnerability for details.

Package repository status

The official Linux (apt/yum) package repositories are now located at A list of all available repositories can be found at:

The old is going to be removed on the 31st of August.

For more details on packages, see Releases & Downloads


You can access the varnish-cache homepages with HTTP or HTTPS as you like.

We save the logfiles from our Varnish instance for a limited period, in order to be able to debug problems.

We do not use any external trackers and do not analyze traffic.