* Make sure that you have "named-chroot.service" enableenabled.* Start the "named" service: systemctl start named-chroot.service * Check the status of the "named" service: systemctl status named-chroot.service. Make sure the "named-chroot" service is active and running. If the "named" service failed to start, check for typo or syntax error in the BIND configuration file /etc/named.conf and your forward and reverse lookup zone files. There are two utilities provided by the "bind" package. They are called "named-checkconf" and "named-checkzone", and both are in the /usr/sbin directory.