As of July 28, 2020, we have released a critical security update to Checkbox version 6 to provide support for TLS 1.2 in the Checkbox Service. This update will bring Checkbox 6 installations up to date in terms of the currently supported security protocols by Google, Firefox, and Microsoft.
On-premises customers who are currently using Checkbox version 6 (including 6.0 - 6.7 or 2014Q4 - 2018Q2 ) should download the update from their support portal and apply it as soon as possible. To apply the update, download the 2018Q2 files and follow the instructions in the Documentation -> Security Updates folder.
Customers whose support contracts have lapsed may renew their contracts to access the update by emailing firstname.lastname@example.org.