Firepower (FTD) FlexConfig
A FlexConfig policy is a container of an ordered list of FlexConfig objects. The contents of each FlexConfig object is essentially a program that generates a sequence of ASA commands. FlexConfig is to allow you to configure features that are not yet directly supported through FMC policies and settings. You can use variables in a FlexConfig object in cases where part of a command or processing instruction depends on runtime information rather than static information.