Kaspersky Embedded Systems Security for Linux

Updating databases and modules

During an update, the following objects are downloaded and installed on your device:

• Application databases. Application databases include databases of malware signatures, a description of network attacks, databases of malicious and phishing web addresses, databases of banners, spam databases, and other data.

  If the database update on the device is interrupted or finishes with an error, the application continues to use the previously installed database version. If application databases were not installed before, the application continues functioning in "without databases" mode. Database and application module updates are still available.

  If the database update is successful, but the databases themselves are corrupted and the application terminates with an error several times in a row, the databases are automatically deleted. The application continues to work in the "without databases" mode; the database and application module update functionality remains available.

  The databases are up to date if they were downloaded less than three days ago. By default, the application generates the Databases are out of date event (BasesAreOutOfDate) if the last installed database updates were published on the Kaspersky servers more than three but less than seven days ago. If the databases have not been updated for seven days, the application generates the Databases are extremely out of date (BasesAreTotallyOutOfDate) event.

• Application modules. Module updates are intended to eliminate vulnerabilities in the application and to improve methods of protecting devices. Module updates may change the behavior of application components and add new capabilities.

  The application module can be installed regardless of the state of the application (started or stopped, managed by a Kaspersky Security Center policy) and the update schedule. Kaspersky Embedded Systems Security continues protecting your device during the application module update procedure. During the update, application settings and the application log file are migrated to the new version of the application.

  If the transfer of application settings fails for any reason, the application is set to the default values.

  Changes to the application settings made after the update is complete and before the application restarts are not saved.

  After updating version of the application using an autopatch, the mechanism for interacting with the operating system firewall changes: the rules are managed using the iptables and iptables-restore system utilities.

  If the application does not work properly after the update, it automatically rolls back to the previous version. It is recommended to contact Kaspersky Technical Support.