SELinux Cookbook

Building a simple SELinux module

Now that we have a development environment, it is time to create our first SELinux policy module. As its purpose does not matter at this point, we will focus on a privilege that is by default not allowed (and rightfully so) yet easy to verify, as we want to make sure that our policy development approach works. The privilege we are going to grant is to allow the system logger to write to a logfile labeled named_conf_t (the type used for the configuration of the BIND DNS server—known as named).

Note

Building SELinux policy modules is to extend the existing policy with more rules that allow certain accesses. It is not possible to create a policy module that reduces the allowed privileges for a domain. If this is needed, ...