While Templates and Template Stacks enable you to apply a base configuration to multiple firewalls, you
might want to configure firewall-specific settings that don’t apply
to all the firewalls in a template or template stack. Overrides
allow for exceptions or modifications to meet your deployment needs.
For example, if you use a template to create a base configuration
but a few firewalls in a test lab environment need different settings
for the Domain Name System (DNS) server IP address or the Network
Time Protocol (NTP) server, you can override the template settings.