The IP Filter feature of Oracle Solaris is a firewall that provides stateful packet filtering and network address translation (NAT). IP Filter also includes stateless packet filtering and the ability to create and manage address pools.
Packet filtering provides basic protection against network-based attacks. IP Filter can filter by IP address, port, protocol, network interface, and traffic direction. IP Filter can also filter by an individual source IP address, a destination IP address, by a range of IP addresses, or by address pools.
IP Filter is derived from open source IP Filter software. To view license terms, attribution, and copyright statements for open source IP Filter, the default path is /usr/lib/ipf/IPFILTER.LICENCE. If Oracle Solaris has been installed anywhere other than the default, modify the given path to access the file at the installed location.