master : in zone files
masters ip : 192.168.0.10
2015122601; serial => must changed when zone file edited
IN NS ns.owllab.org.
IN NS ns1.owllab.org.
slave : in named.conf file
# vi /etc/named/named.conf
zone "owllab.org" IN {type slave;masters {192.168.0.10;};notify yes;file "slaves/owllab.org";};