I’m new here, please explain this Varnish thing

What is happening¶

2020-09-25 - Varnish 6.5.1 is released¶ When preparing the 6.5.0 release, it was forgotten to bump the VRT_MAJOR_VERSION number defined in the vrt.h include file. This major version bump is needed due to the API and ABI changes as part of the release, to make sure that VMODs are not allowed used if they were compiled for the wrong Varnish version. This has been fixed in the Varnish Cache 6.5.1 release.

2020-09-15 - Varnish 6.5.0 is released¶ Come and get it… Varnish Cache 6.5.0

2020-03-16 - Varnish 6.4.0 is released¶ Our bi-annual “fresh” release Varnish Cache 6.4.0

2020-02-04 - Security Advisory: Denial of Service¶ All supported versions of Varnish suffer from a denial of service attack when using the Proxy Protocol version 2. Please see VSV00005.

2020-02-04 - Security releases: 6.0.6, 6.2.3 and 6.3.2¶ Varnish versions 6.0.6, 6.2.3 and 6.3.2 are now available. See VSV00005 for details.

2019-10-21 - Security Advisory: Information leak¶ All supported versions of Varnish can potentially leak some information when certain conditions are met. Please see VSV00004.

2019-10-21 - Security releases: 6.0.5, 6.2.2 and 6.3.1¶ Varnish versions 6.0.5, 6.2.2 and 6.3.1 are now available. See VSV00004 for details.

2019-09-17 - Varnish 6.3.0 is released¶ Our bi-annual “fresh” release Varnish Cache 6.3.0

2019-09-03 - Security Advisory: Denial of Service¶ All supported versions of Varnish are vulnerable to a Denial of Service attack, please see VSV00003.

2019-09-03 - Security releases: 6.0.4 and 6.2.1¶ Varnish versions 6.0.4 and 6.2.1 are now available. See VSV00003 for details.

2019-03-15 - Varnish 6.2.0 is released¶ Come and get it… Varnish Cache 6.2.0 This release brings many improvements under the hood and also some changes that VCL writers need to be aware of. Read more about it here

2019-02-20 - Maintenance release: Varnish Cache 6.0.3¶ We are happy to announce the release of Varnish Cache 6.0.3. This maintenance release is recommended for all users of the 6.0 LTS and contains several bug fixes, improvements and new features. More information is available in the Change log

2019-02-11 - Maintenance release: Varnish Cache 4.1.11¶ We are happy to announce the release of Varnish Cache 4.1.11. 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