config SECURITY_SELINUX bool "NSA SELinux Support" depends on SECURITY default n help This enables NSA Security-Enhanced Linux (SELinux). You will also need a policy configuration and a labeled filesystem. You can obtain the policy compiler (checkpolicy), the utility for labeling filesystems (setfiles), and an example policy configuration from http://www.nsa.gov/selinux. If you are unsure how to answer this question, answer N. config SECURITY_SELINUX_DEVELOP bool "NSA SELinux Development Support" depends on SECURITY_SELINUX default y help This enables the development support option of NSA SELinux, which is useful for experimenting with SELinux and developing policies. If unsure, say Y. With this option enabled, the kernel will start in permissive mode (log everything, deny nothing) unless you specify enforcing=1 on the kernel command line. You can interactively toggle the kernel between enforcing mode and permissive mode (if permitted by the policy) via /selinux/enforce. config SECURITY_SELINUX_MLS bool "NSA SELinux MLS policy (EXPERIMENTAL)" depends on SECURITY_SELINUX && EXPERIMENTAL default n help This enables the NSA SELinux Multi-Level Security (MLS) policy in addition to the default RBAC/TE policy. This policy is experimental and has not been configured for use. Unless you specifically want to experiment with MLS, say N.