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dnsextd(8)                BSD System Manager's Manual               dnsextd(8)

NAME
     dnsextd -- BIND Extension Daemon

SYNOPSIS
     dnsextd

DESCRIPTION
     dnsextd is a daemon invoked at boot time, running alongside BIND 9, to implement two EDNS0 extensions
     to the standard DNS protocol.

     dnsextd allows clients to perform DNS Updates with an attached lease lifetime, so that if the client
     crashes or is disconnected from the network, its address records will be automatically deleted after
     the lease expires.

     dnsextd allows clients to perform long-lived queries. Instead of rapidly polling the server to discover
     when information changes, long-lived queries enable a client to indicate its interest in some set of
     data, and then be notified asynchronously by the server whenever any of that data changes.

     dnsextd has no user-specifiable command-line argument, and users should not run dnsextd manually.

SEE ALSO
     mDNS(1) mDNSResponder(8)

     For information on Dynamic DNS Update, see RFC 2136 "Dynamic Updates in the Domain Name System (DNS
     UPDATE)"

     For information on Dynamic DNS Update Leases, see http://files.dns-sd.org/draft-dns-update-leases.txt

     For information on Long-Lived Queries, see http://files.dns-sd.org/draft-dns-llq.txt

BUGS
     dnsextd bugs are tracked in Apple Radar component "mDNSResponder".

HISTORY
     The dnsextd daemon first appeared in Mac OS X 10.4 (Tiger).

Darwin                         October 11, 2013                         Darwin