NAME

       Net::DNS::RR::SOA - DNS SOA resource record

SYNOPSIS

       "use Net::DNS::RR";

DESCRIPTION

       Class for DNS Start of Authority (SOA) resource records.

METHODS

   mname
           print "mname = ", $rr->mname, "\n";

       Returns the domain name of the original or primary nameserver for this zone.

   rname
           print "rname = ", $rr->rname, "\n";

       Returns a domain name that specifies the mailbox for the person responsible for this zone.

   serial
           print "serial = ", $rr->serial, "\n";
           $new_serial = $rr->serial(value);

       Unsigned 32 bit version number of the original copy of the zone.  Zone transfers preserve
       this value.

       RFC1982 defines a strict (irreflexive) partial ordering for zone serial numbers. The
       serial number will be incremented unless the replacement value argument satisfies the
       ordering constraint.

   refresh
           print "refresh = ", $rr->refresh, "\n";

       Returns the zone's refresh interval.

   retry
           print "retry = ", $rr->retry, "\n";

       Returns the zone's retry interval.

   expire
           print "expire = ", $rr->expire, "\n";

       Returns the zone's expire interval.

   minimum
           print "minimum = ", $rr->minimum, "\n";

       Returns the minimum (default) TTL for records in this zone.

Zone Serial Number Management

       The internal logic of the serial() method offers support for several widely used zone
       serial numbering policies.

   Strictly Sequential
           $successor = $soa->serial( SEQUENTIAL );

       The existing serial number is incremented modulo 2**32 because the value returned by the
       auxiliary SEQUENTIAL() function can never satisfy the serial number ordering constraint.

   Date Encoded
           $successor = $soa->serial( YYYYMMDDxx );

       The 32 bit value returned by the auxiliary YYYYMMDDxx() function will be used if it
       satisfies the ordering constraint, otherwise the existing serial number will be
       incremented as above.

       Serial number increments must be limited to 100 per day for the date information to remain
       useful.

   Time Encoded
           $successor = $soa->serial( time );

       The 32 bit value returned by the perl CORE::time() function will be used if it satisfies
       the serial number ordering constraint, otherwise the existing value will be incremented as
       above.

COPYRIGHT

       Copyright (c) 1997-2002 Michael Fuhr.

       Portions Copyright (c) 2002-2004 Chris Reinhardt.

       Portions Copyright (c) 2011 Dick Franks.

       All rights reserved.  This program is free software; you may redistribute it and/or modify
       it under the same terms as Perl itself.

SEE ALSO

       perl(1), Net::DNS, Net::DNS::Resolver, Net::DNS::Packet, Net::DNS::Header,
       Net::DNS::Question, Net::DNS::RR, RFC 1035 Section 3.3.13, RFC1982