mDNSShared/dnsextd.8

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   3 .\" Copyright (c) 2004 Apple Computer, Inc. All Rights Reserved.
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   5 .\" Licensed under the Apache License, Version 2.0 (the "License");
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  17 .\" $Log: dnsextd.8,v $
  18 .\" Revision 1.2  2006/08/14 23:24:56  cheshire
  19 .\" Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0
  20 .\"
  21 .\" Revision 1.1  2004/08/15 18:49:18  cheshire
  22 .\" <rdar://problem/3763030> No man page for dnsextd
  23 .\"
  24 .\"
  25 .\"
  26 .Dd August 2004             \" Date
  27 .Dt dnsextd 8               \" Document Title
  28 .Os Darwin                  \" Operating System
  29 .\"
  30 .Sh NAME
  31 .Nm dnsextd
  32 .Nd BIND Extension Daemon   \" Name Description for whatis database
  33 .\"
  34 .Sh SYNOPSIS
  35 .Nm
  36 .\"
  37 .Sh DESCRIPTION
  38 .Nm
  39 is a daemon invoked at boot time, running alongside BIND 9,
  40 to implement two EDNS0 extensions to the standard DNS protocol.
  41 .Pp
  42 .Nm
  43 allows clients to perform DNS Updates with an attached lease lifetime,
  44 so that if the client crashes or is disconnected from the network, its
  45 address records will be automatically deleted after the lease expires.
  46 .Pp
  47 .Nm
  48 allows clients to perform long-lived queries. Instead of rapidly polling
  49 the server to discover when information changes, long-lived queries
  50 enable a client to indicate its interest in some set of data, and then
  51 be notified asynchronously by the server whenever any of that data changes.
  52 .Pp
  53 .Nm
  54 has no user-specifiable command-line argument, and users should not run
  55 .Nm
  56 manually.
  57 .\"
  58 .Sh SEE ALSO
  59 .Xr mDNS 1
  60 .Xr mDNSResponder 8
  61 .Pp
  62 For information on Dynamic DNS Update, see RFC 2136
  63 "Dynamic Updates in the Domain Name System (DNS UPDATE)"
  64 .Pp
  65 For information on Dynamic DNS Update Leases, see
  66 .Pa http://files.dns-sd.org/draft-dns-update-leases.txt
  67 .Pp
  68 For information on Long-Lived Queries, see
  69 .Pa http://files.dns-sd.org/draft-dns-llq.txt
  70 .\"
  71 .Sh BUGS
  72 .Nm
  73 bugs are tracked in Apple Radar component "mDNSResponder".
  74 .\"
  75 .Sh HISTORY
  76 The
  77 .Nm
  78 daemon first appeared in Mac OS X 10.4 (Tiger).