FQDN is an acronym for a fully qualified domain name. The FQDN resolver in the Network Security Policy Editor works with the ADC DNS resolver to allow you to use fully qualified domain names where you would otherwise only be able to enter IP addresses.
You configure an FQDN resolver by clicking the device name of the FQDN resolver on the FQDN Resolvers page.
You access the DNS resolver by selecting ADC from the BIG-IQ menu, and then clicking DNS Resolvers on the left.
The BIG-IQ® system can discover FQDN support on a BIG-IP ®device version 12.0 or later, or created on a BIG-IQ system using the Network Security Policy Editor and then deployed to a BIG-IP device version 12.0 or later.