1; Copyright (C) Internet Systems Consortium, Inc. ("ISC") 2; 3; This Source Code Form is subject to the terms of the Mozilla Public 4; License, v. 2.0. If a copy of the MPL was not distributed with this 5; file, you can obtain one at https://mozilla.org/MPL/2.0/. 6; 7; See the COPYRIGHT file distributed with this work for additional 8; information regarding copyright ownership. 9 10$ORIGIN . 11$TTL 300 ; 5 minutes 12example IN SOA ns3.example. hostmaster.example. ( 13 2000042795 ; serial 14 20 ; refresh (20 seconds) 15 20 ; retry (20 seconds) 16 1814400 ; expire (3 weeks) 17 3600 ; minimum (1 hour) 18 ) 19example. NS ns3.example. 20ns3.example. A 10.53.0.3 21