The Sun Fire 15K domain configuration implemented by the Solaris Security Toolkit domain driver is a Sun supported configuration. While it is not required that you use the toolkit to harden the domain, it is strongly recommended.
Sun Support Services will support hardened domains whether security modifications are performed manually or through the use of the Solaris Security Toolkit software.
Please note that the toolkit is not a supported Sun product; only the end-configuration created by the toolkit is supported. Toolkit support is available through the Sun_ SupportForum discussion group at http://www.sun.com/security/jass