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replaced tor detection with DNSBL

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This commit is contained in:
Savetheinternet 2011-05-19 17:37:23 +10:00
parent 99ed879e17
commit db1f0e9446
3 changed files with 26 additions and 29 deletions
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37
inc/functions.php
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@ -991,34 +991,31 @@
)));
}
function isDNSBL() {
$dns_black_lists = file('./dnsbl.txt', FILE_IGNORE_NEW_LINES);
function checkDNSBL() {
global $config;
// Reverse the IP
$rev_ip = implode(array_reverse(explode('.', $_SERVER['REMOTE_ADDR'])), '.');
$response = array();
foreach ($dns_black_lists as $dns_black_list) {
$response = (gethostbynamel($rev_ip . '.' . $dns_black_list));
if(!empty($response))
return true;
if(isIPv6())
return; // No IPv6 support yet.
if(!isset($_SERVER['REMOTE_ADDR']))
return; // Fix your web server configuration
// Reverse IP
$ip = ReverseIPOctets($_SERVER['REMOTE_ADDR']);
foreach($config['dnsbl'] as &$blacklist) {
$lookup = $ip . '.' . $blacklist;
if(gethostbyname($lookup) != $lookup) {
// On NXDOMAIN (meaning it's not in the blacklist), gethostbyname() returns the host unchanged.
error(sprintf($config['error']['dnsbl'], $blacklist));
}
}
return false;
}
function isIPv6() {
return strstr($_SERVER['REMOTE_ADDR'], ':') !== false;
}
function isTor() {
if(isIPv6())
return false; // Tor does not support IPv6
return gethostbyname(
ReverseIPOctets($_SERVER['REMOTE_ADDR']) . '.' . $_SERVER['SERVER_PORT'] . '.' . ReverseIPOctets($_SERVER['SERVER_ADDR']) . '.ip-port.exitlist.torproject.org'
) == '127.0.0.2';
}
function ReverseIPOctets($ip) {
$ipoc = explode('.', $ip);
return $ipoc[3] . '.' . $ipoc[2] . '.' . $ipoc[1] . '.' . $ipoc[0];