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
7

SYNOPSIS

9       perl-nocem
10

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               gpg1 --no-default-keyring --primary-keyring <pathetc>/pgp/ncmring.gpg \
32                    --no-options --allow-non-selfsigned-uid --no-permission-warning \
33                    --batch --import <key-file>
34               chmod 644 <pathetc>/pgp/ncmring.gpg
35
36           where <pathetc> is the value of the pathetc parameter set in
37           inn.conf and <key-file> the file containing the key(s) to import.
38           The keyring must be located in <pathetc>/pgp/ncmring.gpg; you only
39           have to create the directory <pathetc>/pgp before using gpg (it
40           will automatically generate the ncmring.gpg file) and make sure the
41           news user can read this file, once generated.
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43           As a few NoCeM issuers are still using old PGP-generated keys, you
44           may have to use gpg1 with various legacy options in command-line
45           (like in the example above) instead of more recent versions of gpg
46           that no longer accept such keys.
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48           The keys of NoCeM issuers can be found in the web site of The NoCeM
49           Registry: <http://rosalind.home.xs4all.nl/nocemreg/nocemreg.html>.
50           You can even download there a unique file which contains all the
51           keys.
52
53       2.  Create a nocem.ctl config file in pathetc indicating the NoCeM
54           issuers and notices you want to follow.  This permission file
55           contains lines like:
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57               bleachbot@httrack.com:spam,site
58               pgpmoose@killfile.org:pgpmoose-forged-moderation
59
60           This will remove all articles for which the issuer (first part of
61           the line, before the colon ":") has issued NoCeM notices
62           corresponding to the criteria specified after the colon.
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64           You will also find information about that on the web site of The
65           NoCeM Registry.
66
67       3.  Add to the newsfeeds file an entry like this one in order to feed
68           perl-nocem the NoCeM notices posted to alt.nocem.misc and
69           news.lists.filters:
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71               nocem!\
72                   :!*,alt.nocem.misc,news.lists.filters\
73                   :Tc,Wf,Ap:<pathbin>/perl-nocem
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75           with the correct path to perl-nocem, located in <pathbin>.  Then,
76           reload the newsfeeds file ("ctlinnd reload newsfeeds 'NoCeM channel
77           feed'").
78
79           Note that you should at least carry news.lists.filters on your news
80           server (or other newsgroups where NoCeM notices are sent) if you
81           wish to process them.
82
83       4.  Everything should now work.  However, do not hesitate to manually
84           test perl-nocem with a NoCeM notice, using:
85
86               grephistory '<Message-ID>' | perl-nocem
87
88           Indeed, perl-nocem expects tokens on its standard input, and
89           grephistory can easily give it the token of a known article, thanks
90           to its Message-ID.
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92       When you have verified that everything works, you can eventually turn
93       off regular spam cancels, if you want, not processing any longer
94       cancels containing "cyberspam" in the Path: header (see the
95       refusecybercancels parameter in inn.conf).
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FILES

98       pathbin/perl-nocem
99           The Perl script itself used to process NoCeM notices.
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101       pathetc/nocem.ctl
102           The configuration file which specifies the NoCeM notices to be
103           processed.
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105       pathetc/pgp/ncmring.gpg
106           The keyring which contains the public keys of trusted NoCeM
107           issuers.
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BUGS

110       The Subject: header is not checked for the @@NCM string and there is no
111       check for the presence of the References: header.
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113       The Newsgroups: pseudo header is not checked, but this can be done in
114       local_want_cancel_id().
115
116       The Hierarchies: header is ignored.
117

HISTORY

119       Copyright 2000 by Miquel van Smoorenburg <miquels@cistron.nl>.
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121       Copyright 2001 by Marco d'Itri <md@linux.it>.
122
123       $Id: perl-nocem.in 10399 2020-11-12 20:24:35Z iulius $
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NAME

SYNOPSIS

DESCRIPTION

FILES

BUGS

HISTORY

SEE ALSO