FQDN in VIPs
Instead of mapping to an IP address a VIP can use a FQDN(Fully Qualified Domain Name). This has to be configured in the CLI and the FQDN must be an address object that is already configured in the address listing.
The syntax for using a FQDN is:
config firewall vip edit <VIP id> set type fqdn
set mappped-addr <FQDN address object> end