des.pf.			30 IN SOA ns1.vini.pf. system.onati.pf. (
				2018121201 ; serial
				21600      ; refresh (6 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

Name servers:
des.pf.			30 IN NS ns2.vini.pf.
des.pf.			30 IN NS ns1.vini.pf.