dccsight(8)           Distributed Checksum Clearinghouse           dccsight(8)


NAME

     dccsight -- Distributed Checksum Clearinghouse raw checksum interface


SYNOPSIS

     dccsight [-VdPQC] [-h homedir] [-m map] [-w whiteclnt] [-t targets]
              [-i infile] [-L ltype,facility.level]


DESCRIPTION

     Dccsight reads one or more lines containing DCC checksums, reports them
     to a DCC server, and writes a X-DCC header line.  It can be used to
     report checksums obtained from dccproc(8) using -C.

   OPTIONS
     The following options are available:

     -V   displays the version of the DCC raw checksum interface.  Two or more
          -V options show the options with which it was built.

     -d   enables debugging output from the DCC client software.  Additional
          -d options increase the number of messages.

     -P   The SpamAsassin DCC.pm plugin should watch for "bulk" in X-DCC SMTP
          header fields, but historically has looked for counts of "many".
          However, there are situations when dccsight knows that a mail mes-
          sage is extremely bulky and probably spam.  For example, mail from a
          sender that is blacklisted in whiteclnt gets an X-DCC header that
          includes bulk.  To acommodate that bug in SpamAssassin, by default
          whenever dccsight generates an X-DCC header containing "bulk", it
          also forces the Body count to "many".  -P turns off that kludge and
          the Body contains the count from the DCC server.

     -Q   only queries the DCC server about the checksums of messages instead
          of reporting.  This is useful when dccsight is used to filter mail
          that has already been reported to a DCC server by another DCC
          client.  No single mail message should be reported to a DCC server
          more than once per recipient, because each report will increase the
          apparent "bulkness" of the message.

          It is better to use MXDCC lines in the global /var/dcc/whiteclnt
          file for your MX mail servers that use DCC than to use -Q with
          dccsight.

          Do not use -Q except on mail that you know has been reported to a
          DCC server.  DCC depends on reports of all except known private mail
          and works only because almost no DCC installations use -Q.

     -C   outputs the checksums for the message as well as the X-DCC header.

     -h homedir
          overrides the default DCC home directory, /var/dcc.

     -m map
          specifies a name or path of the memory mapped parameter file instead
          of the default /var/dcc/map in the DCC home directory.  It should be
          created with the cdcc(8) command.

     -w whiteclnt
          specifies an optional file containing SMTP client IP addresses and
          SMTP headers of mail that do not need X-DCC headers and whose check-
          sums should not be reported to the DCC server.  It can also contain
          checksums of spam.  If the pathname is not absolute, it is relative
          to the DCC home directory.  Thus, individual users with private
          whitelists usually specify them with absolute paths.  It is useful
          to include a common or system-wide whitelist in private lists.

          The format of the dccsight whiteclnt file is the same as the
          /var/dcc/whitelist file required by dbclean(8) and dccsight(8).
          Because this list is used frequently, a companion file is used.  It
          has the same pathname but with an added suffix of .dccw.  After
          being created empty, it will contain an automatic memory mapped hash
          table of the main file.

     -t targets
          specifies the number of addressees of the message if other than 1.
          The string many instead of a number asserts that there were too many
          addressees and that the message is unsolicited bulk email.

     -i infile
          specifies an input file instead of standard input.  If not absolute,
          the pathname is interpreted relative to the directory in which
          dccsight was started.

     -L ltype,facility.level
          specifies how messages should be logged.  Ltype must be error, info,
          or off to indicate which of the two types of messages are being con-
          trolled or to turn off all syslog(3) messages from dccsight.  Level
          must be a syslog(3) level among EMERG, ALERT, CRIT, ERR, WARNING,
          NOTICE, INFO, and DEBUG.  Facility must be among AUTH, AUTHPRIV,
          CRON, DAEMON, FTP, KERN, LPR, MAIL, NEWS, USER, UUCP, and LOCAL0
          through LOCAL7.  The default is equivalent to
                -L info,MAIL.NOTICE -L error,MAIL.ERR

     dccsight exits 0 on success, and >0 if an error occurs.


FILES

     /var/dcc   DCC home directory.
     map        memory mapped file in the DCC home directory of information
                concerning DCC servers.
     whiteclnt  contains the client whitelist in the format described in
                dcc(8).
     whiteclnt.dccw
                memory mapped hash table of the /var/dcc/whiteclnt file.


SEE ALSO

     cdcc(8), dcc(8), dbclean(8), dccd(8), dblist(8), dccproc(8), dccm(8),
     dccifd(8), mail(1), procmail(1).


HISTORY

     Implementation of dccsight was started at Rhyolite Software in 2000.
     This document describes version 1.3.162.

                               December 06, 2017

Man(1) output converted with man2html modified for DCC $Date 2001/04/29 03:22:18 $