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10.7.3. Booleans

SELinux is based on the least level of access required for a service to run. Services can be run in a variety of ways; therefore, you must tell SELinux how you are running services. The following Booleans allow you to tell SELinux how you are running NFS:
named_write_master_zones
When disabled, this Boolean prevents named from writing to zone files or directories labeled with the named_zone_t type. named does not usually need to write to zone files; but in the case that it needs to, or if a secondary server needs to write to zone files, enable this Boolean to allow this action.