Addresses and Address Groups Overview
Addresses specify an IP address or a hostname. You can create addresses that can be used across all devices managed by Security Director. Addresses are used in firewall, NAT, IPS, and VPN services and apply to corresponding SRX Series devices. If you only know the hostname, you enter it into the Hostname field and use the address resolution option to resolve it to an IP address. You can also resolve an IP address to the corresponding hostname.
Once you create an address, you can combine it with other addresses to form an address group. Address groups are useful when you want to apply the same policy to multiple addresses.
Security Director manages its address book at the global level, assigning objects to devices that are required to create policies. An address book is a collection of addresses and address groups that are available in a security zone. If the device is capable of using a global address book, Security Director pushes address objects used in the policies to the device global address book.