$TTL 3600
@	IN	SOA	in.thelinuxpro.net. hostmaster.in.thelinuxpro.net. (
			24051301	 	; 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.in.thelinuxpro.net.
52.22	IN	PTR	pi502.in.thelinuxpro.net.
53.22	IN	PTR	pi503.in.thelinuxpro.net.
54.22	IN	PTR	pi504.in.thelinuxpro.net.
61.22	IN	PTR	pi401.in.thelinuxpro.net.
11.23	IN	PTR	jenkins.in.thelinuxpro.net.
12.23	IN	PTR	git.in.thelinuxpro.net.
13.23	IN	PTR	git-mysql.in.thelinuxpro.net.
21.23	IN	PTR	docker-regsitry1.in.thelinuxpro.net.
71.23	IN	PTR	es01.in.thelinuxpro.net.
72.23	IN	PTR	kibana.in.thelinuxpro.net.
73.23	IN	PTR	metricbeat01.in.thelinuxpro.net.
74.23	IN	PTR	filebeat01.in.thelinuxpro.net.
75.23	IN	PTR	logstash01.in.thelinuxpro.net.
99.23	IN	PTR	viz.in.thelinuxpro.net.
241.153	IN	PTR	ns1.in.thelinuxpro.net.
242.153	IN	PTR	ns2.in.thelinuxpro.net.