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NNRPD(8)										 NNRPD(8)

       nnrpd - NNTP server for on-campus hosts

       nnrpd  [ -b address ] [ -D ] [ -g shadowgroup ] [ -i ] [ -o ] [ -p port ] [ -R ] [ -r rea-
       son ] [ -S ] [ -s title padding ] [ -t ]

       Nnrpd is an NNTP server for newsreaders.  It accepts commands on its  standard  input  and
       responds on its standard output.  It is normally invoked by innd(8) with those descriptors
       attached to a remote client connection.	Nnrpd also supports running as a standalone  dae-

       Unlike innd, nnrpd supports all NNTP commands for user-oriented reading and posting.

       Nnrpd  uses  the  readers.conf(5)  file	to control who is authorized to access the Usenet
       database.  When <NNRP_LOADLIMIT in include/config.h> is not 0, It will also reject connec-
       tions if the load average is greater than that value (typically 16.)

       On exit, nnrpd will report usage statistics through syslog(3).

       Nnrpd can also prevent high-volume posters from abusing your resources. See the discussion
       of exponential backoff in inn.conf(5).

       -b     The ``-b'' parameter instructs nnrpd to bind  to	the  specified	IP  address  when
	      started  as  a  standalone  daemon  using  the ``-D'' flag.  This has to be a valid
	      Internet address in dotted-quad format belonging to an interface of the local host.

       -D     If specified, this parameter causes nnrpd to operate  as	a  daemon.  That  is,  it
	      detaches itself and runs in the background, forking a process for every connection.
	      By default nnrpd listens on the NNTP port (119), so either innd has to  be  started
	      on another port or nnrpd is invoked with the ``-p'' parameter.  Note that with this
	      parameter, nnrpd	continues  running  until  killed.   This  means  that	it  reads
	      inn.conf(5)  once  on startup and never again until restarted.  nnrpd should there-
	      fore be restarted if inn.conf is changed.

       -g     On systems that have  a  shadow  password  file,	nnrpd  tries  to  add  the  group
	      ``shadow''  as  a  supplementary group if it is running in standalone mode. On many
	      systems, members of that group have read permission for the shadow  password  file.
	      The  ``-g'' parameter instructs nnrpd to try to add the named group as a supplemen-
	      tary group on shadow systems instead of ``shadow''.  This only works if  <HAVE_GET-
	      SPNAM  inn  include/config.h>  is  defined  and nnrpd is running in standalone mode
	      since this call only works when nnrpd is started as root.

       -o     The ``-o'' flag causes all articles to be spooled instead of sending them to  innd.
	      Rnews  with ``-U'' flag should be invoked from cron on a regular basis to take care
	      of these articles. This flag is useful if innd in accepting articles and	nnrpd  is
	      started standalone or using inetd.

       -p     The ``-p'' parameter instructs nnrpd to listen on port when started as a standalone
	      daemon using the ``-D'' flag.

       -R     This option forces nnrpd to be ``read-only''.  The  startup  banner  will  indicate
	      ``no posting''.

       -r     If  the  ``-r'' flag is used, then nnrpd will reject the incoming connection giving
	      reason as the text.  This flag is used by innd when it is paused or throttled.

       -S     If specified, nnrpd start a negotiation for SSL session as soon as  connected.   To
	      use this flag, <--with-openssl at configure> must be specified.

       -s     As each command is received, nnrpd tries to change its ``argv'' array so that ps(1)
	      will print out the command being executed.  To get a full display, the ``-s''  flag
	      may  be used with a long string as its argument, which will be overwritten when the
	      program changes its title.

       -t     If the ``-t'' flag is used then all client commands and initial responses  will  be
	      traced  by reporting them in syslog.  This flag is set by innd under the control of
	      the ctlinnd(8) ``trace'' command, and is toggled upon receipt of a SIGHUP; see sig-

       Nnrpd implements the NNTP commands defined in RFC 977, with the following differences:

       1.     The  ``ihave'' command is not implemented.  Users should be using the ``post'' com-
	      mand to post articles.

       2      The ``slave'' command is not  implemented.   This  command  has  never  been  fully

       3      The  ``list'' command may be followed by the optional word ``active.times'', ``dis-
	      tributions'', ``distrib.pats'', ``moderators'', ``newsgroups'',  ``subscriptions'',
	      or ``overview.fmt'' to get a list of when newsgroups where created, a list of valid
	      distributions, a file specifying default distribution patterns, moderators list,	a
	      one-per-line  description of the current set of newsgroups, a list of the automatic
	      group subscriptions, or a listing of the overview.fmt(5) file.  The command  ``list
	      active'' is equivalent to the ``list'' command.  This is a common extension.

       4.     The  ``xhdr'',  ``authinfo  user'', and ``authinfo pass'' commands are implemented.
	      These are based on the reference Unix implementation. See ftp://ftp.ietf.org/inter-

       5.     A  new command, ``xpat header range|MessageID pat [morepat...]'', is provided.  The
	      first argument is the case-insensitive name of the header to be searched.  The sec-
	      ond argument is either an article range or a single Message-ID, as specified in RFC
	      977.  The third argument is a wildmat(3)-style pattern;  if  there  are  additional
	      arguments they are joined together separated by a single space to form the complete
	      pattern.	This command is similar to  the  ``xhdr''  command.   It  returns  a  221
	      response	code, followed by the text response of all article numbers that match the

       6.     The ``listgroup group'' command is provided.  This is a comment extension.   It  is
	      equivalent to the ``group'' command, except that the reply is a multi-line response
	      containing the list of all article numbers in the group.

       7.     The ``xgtitle [group]'' command is provided.  This extension is used  by	ANU-News.
	      It  returns  a 282 reply code, followed by a one-line description of all newsgroups
	      that match the pattern.  The default is the current group.

       8.     The ``xover [range]'' command is provided.  It returns a 224 reply  code,  followed
	      by the overview data for the specified range; the default is to return the data for
	      the current article.

       9.     The ``xpath MessageID'' command is provided; see innd(8).

       10.    The ``date'' command is provided; this is based on the draft  NNTP  protocol  revi-
	      sion(  draft-ietf-nntpext-imp-04.txt).   It returns a one-line response code of 111
	      followed by the GMT date and time on the server in the form YYYYMMDDhhmmss.

       Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews.  Overview support added by Rob
       Robertston  <rob@violet.berkeley.edu>  and Rich in January, 1993. Exponential backoff (for
       posting) added  by  Dave  Hayes	in  Febuary  1998.   This  is  revision,  dated

       ctlinnd(8), innd(8), inn.conf(5), signal(2), wildmat(3).

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