[nameserver]
ns1.example.org
ns2.example.org

[nameserver_external]
# External nameservers not managed here
#
# These hosts only serve as dummy hosts to hold the necessary
# information required for using them as zone transfer sources or
# targets
ns3.example.org
# TSIG update clients, also dummy host only
foo.example.org
# Parents nameservers to check for publication of DS records upon KSK
# rollover
a.gtld-servers.net