DESCRIPTION
Security-Enhanced Linux secures the named server via flexible mandatory access control.
BOOLEANS
SELinux policy is customizable based on least access required. So by default SELinux policy does not allow named to write master zone files. If you want to have named update the master zone files you need to set the named_write_master_zones boolean.setsebool -P named_write_master_zones 1
system-config-selinux is a GUI tool available to customize SELinux policy settings.