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CodeBrauer/check_domain_dns.php

Created February 17, 2022 13:47
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Quick and Dirty DNS checker - shows A, MX, TXT & NS Entries with ipinfo.io details
Raw
check_domain_dns.php
<?php
function get_dig($addr, $ns, $type)
{
$addr = escapeshellarg($addr);
$ns = escapeshellarg($ns);
$type = escapeshellarg($type);
$cmd = "dig +short {$addr} {$type} @{$ns}";
return shell_exec($cmd);
}
function dig_domain2ip($input)
{
if (strpos($input, "\n") !== false) {
$input_ml = explode("\n", $input);
$input = $input_ml[0];
}
if(filter_var($input,FILTER_VALIDATE_IP)) {
return $input;
}
$input = trim($input);
$input = rtrim($input, '.');
$input = strtolower($input);
$remove_mx_prio = preg_replace('/(\d+\s)/', '', $input);
$ip = gethostbyname($remove_mx_prio);
return $ip;
}
function get_ipinfo($ip)
{
return curl_get_contents('https://ipinfo.io/' . trim($ip) . '/?token=xxxxxxxxxx', 2, false);
}
function curl_get_contents($url, $timeout, $ssl = true)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
if (!$ssl) {
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
}
$output = curl_exec($ch);
curl_close($ch);
if ($output === false && $ssl) {
return curl_get_contents($url, $timeout, false);
}
return $output;
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootswatch/4.5.2/yeti/bootstrap.min.css">
<link rel="icon" type="image/svg+xml" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 width=%22256%22 height=%22256%22 viewBox=%220 0 100 100%22><rect width=%22100%22 height=%22100%22 rx=%2220%22 fill=%22%23b7e9f4%22></rect><text x=%2250%%22 y=%2250%%22 dominant-baseline=%22central%22 text-anchor=%22middle%22 font-size=%2275%22>🛠️</text></svg>" />
<title>Wo liegt die Domain?</title>
</head>
<body>
<div class="jumbotron text-center">
<h1 class="display-5">Wo liegt die Domain?</h1>
<p class="lead">Und zusätzliche Einträge der Haupteinträge</p>
</div>
<div class="container">
<div class="row">
<div class="col-md-3">
<form action="index.php" method="get">
<div class="form-group">
<label for="addr">Domain</label>
<input type="text" class="form-control" name="addr" id="addr" aria-describedby="addrHelp">
<small id="addrHelp" class="form-text text-muted">Mit oder ohne http(s), mir egal.</small>
</div>
<div class="form-group">
<label for="ns">Nameserver</label>
<input type="text" class="form-control" name="ns" id="ns" aria-describedby="nsHelp" value="8.8.8.8">
<small id="nsHelp" class="form-text text-muted">Standardwert, kann durch andere ersetzt werden.</small>
</div>
<div class="form-group form-check">
<input type="checkbox" class="form-check-input" id="bulk" disabled>
<label class="form-check-label" for="bulk">Bulk-Abfrage (bald verfĂĽgbar)</label>
</div>
<button type="submit" class="btn btn-primary">Check</button>
</form>
</div>
<div class="col-md-9">
<?php if (isset($_GET['addr'])):
$addr = str_replace(['https:', 'http:', '/'], '', $_GET['addr']);
$addr = trim($addr);
$ns = trim($_GET['ns']);
$dns_a = get_dig($addr, $ns, 'A');
$dns_mx = get_dig($addr, $ns, 'MX');
$dns_ns = get_dig($addr, $ns, 'NS');
$dns_txt = get_dig($addr, $ns, 'TXT');
?>
<table class="table table-sm">
<thead>
<tr><th>Eintrag</th><th>Wert</th><th>ipinfo (erste zeile)</th></tr>
</thead>
<tbody>
<tr>
<td>A</td>
<td><pre><?= $dns_a ?></pre></td>
<td>
<pre><?= get_ipinfo(dig_domain2ip($dns_a)) ?></pre>
</td>
</tr>
<tr>
<td>MX</td>
<td><pre><?= $dns_mx ?></pre></td>
<td>
<pre><?= get_ipinfo(dig_domain2ip($dns_mx)) ?></pre>
</td>
</tr>
<tr>
<td>TXT</td>
<td><pre><?= $dns_txt ?></pre></td>
<td>
<pre><em>Manuelle Abfrage notwendig</em></pre>
</td>
</tr>
<tr>
<td>Nameserver</td>
<td><pre><?= $dns_ns ?></pre></td>
<td>
<pre><?= get_ipinfo(dig_domain2ip($dns_ns)) ?></pre>
</td>
</tr>
</tbody>
</table>
<?php endif ?>
</div>
</div>
</div>
</body>
</html>
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