$TTL 3600
@	IN	SOA	in.thelinuxpro.net. hostmaster.in.thelinuxpro.net. (
			24042003	 	; serial
			21600      		; refresh after 6 hours
			3600       		; retry after 1 hour
			604800     		; expire after 1 week
			86400 )    		; minimum TTL of 1 day
;
	IN	NS	ns1.in.thelinuxpro.net.
	IN	NS	ns2.in.thelinuxpro.net.
;
51.22	IN	PTR	pi501
61.22	IN	PTR	pi401
11.23	IN	PTR	jenkins
12.23	IN	PTR	git
13.23	IN	PTR	git-mysql
21.23	IN	PTR	docker-regsitry1
71.23	IN	PTR	es01
72.23	IN	PTR	kibana
73.23	IN	PTR	metricbeat01
74.23	IN	PTR	filebeat01
75.23	IN	PTR	logstash01
99.23	IN	PTR	viz
241.153	IN	PTR	ns1
242.153	IN	PTR	ns2