--- pukiwiki.ini.php.orig	2005-07-03 23:16:23.000000000 +0900
+++ pukiwiki.ini.php	2005-10-06 22:01:11.000000000 +0900
@@ -20,6 +20,33 @@
 /////////////////////////////////////////////////
 // Security settings
 
+// check if blacklisted
+$check_if_blacklisted = 1;
+
+$is_blacklisted = 0;
+if ($check_if_blacklisted) {
+	$dnsbl_check = array("list.dsbl.org", "niku.2ch.net");
+	$dnsbl_target = $_SERVER['REMOTE_ADDR'];
+	if ($dnsbl_target) {
+		$quads = explode(".", $dnsbl_target);
+		$rip = $quads[3].".".$quads[2].".".$quads[1].".".$quads[0];
+		for ($i = 0; $i < count($dnsbl_check); $i++) {
+			if (checkdnsrr($rip.".".$dnsbl_check[$i] . '.',"A")) {
+				$is_blacklisted = 1;
+			}
+		}
+	} else {
+		// XXX: not reached
+		$is_blacklisted = 1;
+	}
+}
+
+// if blacklisted
+if ($is_blacklisted) {
+	// make it read only mode
+	define('PKWK_READONLY', 1);
+}
+
 // PKWK_READONLY - Prohibits editing and maintain via WWW
 //   NOTE: Counter-related functions will work now (counter, attach count, etc)
 if (! defined('PKWK_READONLY'))