perl-nocem(8)

1PERL-NOCEM(8)             InterNetNews Documentation             PERL-NOCEM(8)
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NAME

6       perl-nocem - A NoCeM-on-spool implementation for INN 2.x
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SYNOPSIS

9       perl-nocem
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DESCRIPTION

12       NoCeM, which is pronounced No See 'Em, is a protocol enabling
13       authenticated third-parties to issue notices which can be used to
14       cancel unwanted articles (like spam and articles in moderated
15       newsgroups which were not approved by their moderators).  It can also
16       be used by readers as a third-party killfile.  It is intended to
17       eventually replace the protocol for third-party cancel messages.
18
19       perl-nocem processes third-party, PGP-signed article cancellation
20       notices.  It is possible not to honour all NoCeM notices but only those
21       which are sent by people whom you trust (that is to say if you trust
22       the PGP key they use to sign their NoCeM notices).  Indeed, it is up to
23       you to decide whether you wish to honour their notices, depending on
24       the criteria they use.
25
26       Processing NoCeM notices is easy to set up:
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28       1.  Import the keys of the NoCeM issuers you trust in order to check
29           the authenticity of their notices.  You can do:
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31               gpg --no-default-keyring --primary-keyring <pathetc>/pgp/ncmring.gpg --import <key-file>
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33           where <pathetc> is the value of the pathetc parameter set in
34           inn.conf and <key-file> the file containing the key(s) to import.
35           The keyring must be located in <pathetc>/pgp/ncmring.gpg; you only
36           have to create the directory <pathetc>/pgp before using gpg (it
37           will automatically generate the ncmring.gpg file).  For old PGP-
38           generated keys, you may have to use --allow-non-selfsigned-uid if
39           they are not properly self-signed, but anyone creating a key really
40           should self-sign the key.  Current PGP implementations do this
41           automatically.
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43           The keys of NoCeM issuers can be found in the web site of The NoCeM
44           Registry: <http://www.xs4all.nl/~rosalind/nocemreg/nocemreg.html>.
45           You can even download there a unique file which contains all the
46           keys.
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48       2.  Create a nocem.ctl config file in pathetc indicating the NoCeM
49           issuers and notices you want to follow.  This permission file
50           contains lines like:
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52               bleachbot@httrack.com:spam,site
53               pgpmoose@killfile.org:pgpmoose-forged-moderation
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55           This will remove all articles for which the issuer (first part of
56           the line, before the colon ":") has issued NoCeM notices
57           corresponding to the criteria specified after the colon.
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59           You will also find information about that on the web site of The
60           NoCeM Registry.
61
62       3.  Add to the newsfeeds file an entry like this one in order to feed
63           perl-nocem the NoCeM notices posted to alt.nocem.misc and
64           news.lists.filters:
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66               nocem!\
67                   :!*,alt.nocem.misc,news.lists.filters\
68                   :Tc,Wf,Ap:<pathbin>/perl-nocem
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70           with the correct path to perl-nocem, located in <pathbin>.  Then,
71           reload the newsfeeds file ("ctlinnd reload newsfeeds 'NoCeM channel
72           feed'").
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74           Note that you should at least carry news.lists.filters on your news
75           server (or other newsgroups where NoCeM notices are sent) if you
76           wish to process them.
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78       4.  Everything should now work.  However, do not hesitate to manually
79           test perl-nocem with a NoCeM notice, using:
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81               grephistory '<Message-ID>' | perl-nocem
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83           Indeed, perl-nocem expects tokens on its standard input, and
84           grephistory can easily give it the token of a known article, thanks
85           to its Message-ID.
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87       When you have verified that everything works, you can eventually turn
88       off regular spam cancels, if you want, not processing any longer
89       cancels containing "cyberspam" in the Path: header (see the
90       refusecybercancels parameter in inn.conf).
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FILES

93       pathbin/perl-nocem
94           The Perl script itself used to process NoCeM notices.
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96       pathetc/nocem.ctl
97           The configuration file which specifies the NoCeM notices to be
98           processed.
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100       pathetc/pgp/ncmring.gpg
101           The keyring which contains the public keys of trusted NoCeM
102           issuers.
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BUGS

105       The Subject: header is not checked for the @@NCM string and there is no
106       check for the presence of the References: header.
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108       The Newsgroups: pseudo header is not checked, but this can be done in
109       local_want_cancel_id().
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111       The Hierarchies: header is ignored.
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HISTORY

114       Copyright 2000 by Miquel van Smoorenburg <miquels@cistron.nl>.
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116       Copyright 2001 by Marco d'Itri <md@linux.it>.
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118       $Id: perl-nocem.in 8539 2009-06-28 10:01:24Z iulius $
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NAME

SYNOPSIS

DESCRIPTION

FILES

BUGS

HISTORY

SEE ALSO