$ORIGIN .
$TTL 300	; 5 minutes
seminarnet		IN SOA	trainer.seminarnet. dns.seminarnet. (
				43         ; serial
				300        ; refresh (5 minutes)
				300        ; retry (5 minutes)
				604800     ; expire (1 week)
				300        ; minimum (5 minutes)
				)
			NS	dns.seminarnet.
			NS	trainer.seminarnet.
$ORIGIN seminarnet.
dns			A	10.11.12.1
ntp			CNAME	trainer
$TTL 1800	; 30 minutes
T530-2			A	10.11.12.100
			TXT	"00edab67f93ae579652db03a7709b6ff13"
$TTL 300	; 5 minutes
trainer			A	10.11.12.1
w530-1			CNAME	trainer
wpad			CNAME	trainer