add forward-confirmed reverse DNS
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6804a2ede0
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@ -67,6 +67,9 @@
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// Requires safe_mode to be disabled.
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$config['dns_system'] = false;
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// Check validity of the reverse DNS of IP addresses. Highly recommended.
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$config['fcrdns'] = true;
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// When executing most command-line tools (such as `convert` for ImageMagick image processing), add this
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// to the environment path (seperated by :).
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$config['shell_path'] = '/usr/local/bin';
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@ -2265,6 +2265,7 @@ function rDNS($ip_addr) {
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if (!$config['dns_system']) {
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$host = gethostbyaddr($ip_addr);
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$isip = filter_var($host, FILTER_VALIDATE_IP);
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} else {
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$resp = shell_exec_error('host -W 1 ' . $ip_addr);
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if (preg_match('/domain name pointer ([^\s]+)$/', $resp, $m))
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@ -2273,6 +2274,10 @@ function rDNS($ip_addr) {
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$host = $ip_addr;
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}
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if ($config['fcrdns'] && !$isip && gethostbyname($host) != $ip_addr) {
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$host = $ip_addr;
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}
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if ($config['cache']['enabled'])
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cache::set('rdns_' . $ip_addr, $host);
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