1; Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC") 2; 3; Permission to use, copy, modify, and/or distribute this software for any 4; purpose with or without fee is hereby granted, provided that the above 5; copyright notice and this permission notice appear in all copies. 6; 7; THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 8; REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 9; AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 10; INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 11; LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 12; OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 13; PERFORMANCE OF THIS SOFTWARE. 14 15$TTL 600 ; 10 minutes 16@ IN SOA mname1. . ( 17 1 ; serial 18 20 ; refresh (20 seconds) 19 20 ; retry (20 seconds) 20 1814400 ; expire (3 weeks) 21 3600 ; minimum (1 hour) 22 ) 23 NS ns2 24 MX 10 mail 25 26mail A 10.0.0.1 27ns2 A 10.53.0.2 28 29check-srv-cname SRV 1 2 3 target 30; SRV points to a CNAME which is detected by check-srv-cname configuration 31target CNAME mail 32