SUNSCREEN 3.1 LITE IS A STATEFUL advanced packet-filtering firewall for Solaris systems. It is available from Sun Microsystems free of charge and may be downloaded directly from www.sun.com. The following features are present in SunScreen 3.1 Lite:
Stateful packet filtering
VPN (Virtual Private Networking) support
SKIP (Simple Key management for Internet Protocol) support
However, it does not include some of the features provided with the full SunScreen 3.1 product:
Support for more than two interfaces
Support for more than two NAT rules
Time-of-day awareness ...