Net::DNSBL::Statistics - gather DNSBL Statistics

  use Net::DNSBL::Statistics qw(
        run
	plaintxt
	htmltxt
  );

  %dnsblcounts=run(\%config,$NonBlockSock,$sockaddr_in);
  $text = plaintxt(\%config,\%dnsblscounts);
  $html = htmltxt(\%config,\%dnsblcounts);

Net::DNSBL::Statistics is the Perl module that collects statistics on the interrogation success for a list of IP addresses against a list of DNSBL's. The module is used to implement the reproting script dnsblstat.

With the addition of a few elements, the configuration file for dnsblstat shares a common format with the Mail::SpamCannibal sc_BLcheck.pl script, facilitating common maintenance of DNSBL's for your MTA installation.

The sample configuration file statistics.conf.sample is heavily commented with the details for each configuration element.

dnsblstat responds to the following system signals:

* TERM

Script is terminated.

Net::DNSBL::Statistics provides most of the functions that implement dnsblstat which is a script that collects statistics from a list of IP address interrogations against a list of DNSBL's

How to use dnsblstat

  Syntax: dnsblstat path/to/config.file
    or
        dnsblstat -t path/to/config.file
        dnsblstat -w path/to/config.file

Normally dnsblstat prints a sorted list (by count) of the DNSBL's interrogated with their reply count, percentage of the total count, and any comments from the DNSBL's 'comment' key field in the config file. The 'comment' field may contain html markup text.

  i.e.
  44 100.0%  TOTAL IP's interrogated
  41  93.2%  UNION of all results   
  34  77.3%  dnsbl.sorbs.net comment
  ........

The -t switch will print a start and stop time.

  i.e.
  # start: Fri Jan  4 17:46:44 2008
  # stop : Fri Jan  4 17:58:21 2008

The -w switch will put the output into an HTML table without the <table> statement </table>>., a commment as above and with an <a href="...">dnsbl name</a> statement replacing the dnsbl name if the 'url' key is present in the config file.

  i.e.
  A one line example corresponding to the text line above:

  34  77.3% dnsbl.sorbs.net

  with a 'comment' key of: 127.0.0.2,5,7,8,9,10,12
  and a 'url' key of:      http://www.au.sorbs.net/using.shtml

  <tr class=dnsbl><td align=right>34</td>
    <td align=right>77.3%</td>
    <td align=left><a
     href="http://www.au.sorbs.net/using.shtml">dnsbl.sorbs.net</a></td>
    <td align=left>127.0.0.2,5,7,8,9,10,12</td>
  </tr>

* %dnsblscounts=run(\%config,$NonBlockSock,$sockaddr_in);

Returns the total number of IP's interrogated (IP list less white listed items) and a hash of DNSBL names and their respective SPAM reply counts or equivalent for 'in-addr.arpa' and GENERIC.

  input:   config pointer,
	   non-blocking socket descriptor,
	   sockaddr_in for local DNS host

  returns: dnsbl count hash

The dnsbl count hash will have two added keys:

	TOTAL	the total number of interrogations less whitelist
	UNION	the total number of spam 'hits'

  HINTs:   use Net::NBsocket qw( open_udbNB sockaddr_in );
	   use Net::DNS::ToolKit qw( get_ns );

	   my $sock = open_udpNB();
	   my $sockaddr_in = sockaddr_in(53, scalar get_ns());

* $text = plaintxt($config,\%dnsbls);

Generate a plain text report of the form:

  44 100.0%  TOTAL IP's interrogated
  41  93.2%  UNION of all results
  34  77.3%  dnsbl.sorbs.net comment
  22  50.0%  GENERIC comment
  13  29.5%  in-addr.arpa comment
  11  25.0%  cbl.abuseat.org comment
  9   20.5%  list.dsbl.org comment
  2    4.5%  dnsbl.njabl.org comment
  1    2.3%  bl.spamcannibal.org comment
  0    0.0%  dynablock.njabl.org comment

  input:	configuration pointer,
		dnsbl count hash pointer
  returns:	text buffer

The 'comment' comes from the config file 'comment' key field for each specified DNSBL or is blank if there is no 'comment' key.

* $html = htmltxt($config,\%dnsbls);

Generate a report as above but with <tr><td></td></tr> table markup. The <table></table> tags are not generated. If there is a 'url' key field in the respective DNSBL config entry, the DNSBL name is provide with <a href="url">DNSBL</a> tags with the specified 'url' as the 'href' value.

  input:	configuration pointer,
		dnsbl count hash pointer
  returns:	html text buffer

A one line example corresponding to the text line above:

  34  77.3% dnsbl.sorbs.net 

  with a 'comment' key of: 127.0.0.2,5,7,8,9,10,12
  and a 'url' key of:      http://www.au.sorbs.net/using.shtml

  <tr class=dnsbl><td align=right>34</td>
    <td align=right>77.3%</td>
    <td align=left><a 
     href="http://www.au.sorbs.net/using.shtml">dnsbl.sorbs.net</a></td>
    <td align=left>127.0.0.2,5,7,8,9,10,12</td>
  </tr>

Read the contrib/HOWTO document that describes the scripts used with 'cron' to auto generate web pages for the statistics reports

        run
	plaintxt
	htmltxt

Michael Robinton, michael@bizsystems.com

Copyright 2008, Michael Robinton. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

Mail::SpamCannibal, Net::DNS::Codes, Net::DNS::ToolKit, Net::DNSBL::MultiDaemon