Beginning with the Solaris 10 7/07 release: Packet filter hooks are now used for packet filtering in Oracle Solaris. This feature offers the following advantages in system administration:
Packet filter hooks simplify the configuration of the Oracle Solaris IP filter.
Support for filtering packets across zones is now available.
Using filter hooks improves the performance of Oracle Solaris IP Filter.
For further details about these hooks, see Packet Filter Hooks. For tasks that are associated with packet filter hooks, see Chapter 26, Oracle Solaris IP Filter (Tasks).