Sneaking in just before the end of the month Solaris10 Build 51 has been released. This month’s additions include the Solaris IP Filter, Solaris Zones Partitioning Technology, zonename audit token and policy options, the Single UNIX Spec Version 3, and some new Kerberos enhancements. The IP Filter comes directly from the Open Source IP Filter we all know and love, allowing for basic host based firewalling including packet filtering and NAT using CLI tools. The addition of Solaris Zones is very interesting however, providing some new options for workload isolation, resource management and security. Go grab the latest ISOs and make sure to give a copy to everyone who ever dared to mock Solaris.