mDNSShared/dnsextd.8

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