############################################################## 
## MOD Title: Block DNSBL Blacklisted Posting - Black
## MOD Author: Mittineague < N/A > ( N/A ) http://www.mittineague.com/dev
## MOD Description: Prevents those whose IP address is listed on DNSBLs from posting
##			and inflicts a time cost.
## MOD Version: 1.0.1
##
## Installation Level: Easy
## Installation Time: 1 Minute
##
## Files To Edit: 2 	posting.php
##			language/lang_english/lang_main.php
## 
##############################################################
## For Security Purposes, Please Check: http://www.phpbb.com/mods/ for the
## latest version of this MOD. Downloading this MOD from other sites could cause malicious code
## to enter into your phpBB Forum. As such, phpBB will not offer support for MOD's not offered
## in our MOD-Database, located at: http://www.phpbb.com/mods/
##############################################################
## Author Notes:
##
##		This MOD is based heavily (almost entirely) on the 
##		DNSBL Blacklisted Registrants MOD by TerraFrost
##		TerraFrost < N/A > (Jim Wigginton) http://www.frostjedi.com/phpbb
##
##		The author found that although DNSBL and Open Proxy registrations
##		were successfully being blocked by using TerraFrost's MODs, SPAM
##		posts were still being made by "members" that had registered using
##		"good" IP addresses.
##
##		***** This version of the Block DNSBL Blacklisted Posting MOD
##		is indentical to the original version - EXCEPT
##		it inflicts a time cost. Like all things with evil intentions
##		it does not come at a cost to only the inflicted.
##		It is a "2 edged sword" in that not only the offending IP must
##		suffer, but the forum server must also "drink from the same cup".
##		Keep this in mind if you choose to use higher "nap" values. *****
##
##############################################################
## MOD History:
##
##   2007-01-22 - Version 1.0.0		initial release
##
##############################################################
## Before Adding This MOD To Your Forum, You Should Back Up All Files Related To This MOD 
############################################################## 
#
#-----[ OPEN ]------------------------------------------
#
posting.php

#
#-----[ FIND ]------------------------------------------
#
$refresh = $preview || $poll_add || $poll_edit || $poll_delete;

#
#-----[ BEFORE, ADD ]------------------------------------
# DIY - $nap_time is randomly set between 3 seconds and 11 seconds
# if not appropriate for you, change to suit your level of evilness
# *see Author Notes above
#
if ( (isset($mode)) && ($mode != '') )
{
	include_once $phpbb_root_path . 'language/lang_english/lang_main.php';

	$address = $HTTP_SERVER_VARS['REMOTE_ADDR'];
	$rev = implode('.',array_reverse(explode('.', $address)));

	$nap_time = mt_rand(3000000, 11000000);

	$lookup = "$rev.l1.spews.dnsbl.sorbs.net";
	if ($lookup != gethostbyname($lookup))
	{
		usleep($nap_time);
		message_die(GENERAL_MESSAGE, strtr($lang['dsbl_p'],array('%url%' => "http://www.spews.org/ask.cgi?x=$address")));
	}

	$lookup = "$rev.sbl-xbl.spamhaus.org";
	if ($lookup != gethostbyname($lookup))
	{
		usleep($nap_time);
		message_die(GENERAL_MESSAGE, strtr($lang['dsbl_p'],array('%url%' => "http://www.spamhaus.org/query/bl?ip=$address")));
	}

	$lookup = "$rev.list.dsbl.org";
	if ($lookup != gethostbyname($lookup))
	{
		usleep($nap_time);
		message_die(GENERAL_MESSAGE, strtr($lang['dsbl_p'],array('%url%' => "http://dsbl.org/listing?$address")));
	}
}

#
#-----[ OPEN ]------------------------------------------
#
language/lang_english/lang_main.php

#
#-----[ FIND ]------------------------------------------
#
$lang['A_critical_error'] = 'A Critical Error Occurred';

#
#-----[ AFTER, ADD ]------------------------------------
#
$lang['dsbl_p'] = '<p>Your IP address is on a <a href="%url%">DNS-based Blackhole List</a>.</p><p>Posting attempt blocked.</p>';

#
#-----[	SAVE/CLOSE ALL FILES ]------------------------------------------
#
# EoM