|Advanced firewall configuration / Configuring the firewall|
For more information, see Managing roles and sub-estates.
Each version of an application has a unique checksum. The firewall can use this checksum to decide whether an application is allowed or not.
By default, the firewall checks the checksum of each application that runs. If the checksum is unknown or has changed, the firewall blocks it.
To add a checksum to the list of allowed checksums: