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【PHP】检查匿名端口
作者:Dezai.CN / 发布于2011/6/11/ 701
<div><span style="font-style: italic; color: rgb(128,128,128)">//----------------------------------------------------------------</span>
<span style="font-style: italic; color: rgb(128,128,128)">//IsProxy FUNCTION</span>
<span style="font-style: italic; color: rgb(128,128,128)">//----------------------------------------------------------------</span>
<span style="font-style: italic; color: rgb(128,128,128)">// What it does - </span>
<span style="font-style: italic; color: rgb(128,128,128)">// Checks against public lists of blacklisted</span>
<span style="font-style: italic; color: rgb(128,128,128)">// proxy addresses to make sure that $IP isn't one of</span>
<span style="font-style: italic; color: rgb(128,128,128)">// them.</span>
<span style="font-style: italic; color: rgb(128,128,128)">//</span>
<span style="font-style: italic; color: rgb(128,128,128)">// Changes - </span>
<span style="font-style: italic; color: rgb(128,128,128)">// [2006/12/07] - RaX :: Created.</span>
<span style="font-style: italic; color: rgb(128,128,128)">//----------------------------------------------------------------</span>
<span style="color: rgb(0,0,0); font-weight: bold">function</span> IsProxy<span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$IP</span><span style="color: rgb(102,204,102)">)</span>
<span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$Result</span> = <span style="color: rgb(0,0,0); font-weight: bold">FALSE</span>;<span style="font-style: italic; color: rgb(128,128,128)">//Innocent until proven Guilty</span>

<span style="color: rgb(0,0,255)">$BlackList</span> = <a href="http://www.php.net/array" target="_blank"><span style="color: rgb(0,0,102)">array</span></a><span style="color: rgb(102,204,102)">(</span> <span style="color: rgb(255,0,0)">'http.dnsbl.sorbs.net'</span>,
<span style="color: rgb(255,0,0)">'misc.dnsbl.sorbs.net'</span>,
<span style="color: rgb(255,0,0)">'socks.dnsbl.sorbs.net'</span>,
<span style="color: rgb(255,0,0)">'proxies.blackholes.easynet.nl'</span>,
<span style="color: rgb(255,0,0)">'list.dsbl.org'</span>
<span style="color: rgb(102,204,102)">)</span>;

<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><a href="http://www.php.net/preg_match" target="_blank"><span style="color: rgb(0,0,102)">preg_match</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(255,0,0)">"/([0-9]+).([0-9]+).([0-9]+).([0-9]+)/"</span>, <span style="color: rgb(0,0,255)">$IP</span>, <span style="color: rgb(0,0,255)">$Matches</span><span style="color: rgb(102,204,102)">)</span><span style="color: rgb(102,204,102)">)</span>
<span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(177,177,0)">foreach</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$BlackList</span> <span style="color: rgb(177,177,0)">as</span> <span style="color: rgb(0,0,255)">$Server</span><span style="color: rgb(102,204,102)">)</span> 
<span style="color: rgb(102,204,102)">{</span>
<a href="http://www.php.net/echo" target="_blank"><span style="color: rgb(0,0,102)">echo</span></a> <span style="color: rgb(0,0,255)">$Server</span>;
<span style="color: rgb(0,0,255)">$ServerHost</span> = <span style="color: rgb(0,0,255)">$Matches</span><span style="color: rgb(102,204,102)">[</span><span style="color: rgb(204,102,204)">4</span><span style="color: rgb(102,204,102)">]</span> . <span style="color: rgb(255,0,0)">"."</span> . <span style="color: rgb(0,0,255)">$Matches</span><span style="color: rgb(102,204,102)">[</span><span style="color: rgb(204,102,204)">3</span><span style="color: rgb(102,204,102)">]</span> . <span style="color: rgb(255,0,0)">"."</span> . <span style="color: rgb(0,0,255)">$Matches</span><span style="color: rgb(102,204,102)">[</span><span style="color: rgb(204,102,204)">2</span><span style="color: rgb(102,204,102)">]</span> . <span style="color: rgb(255,0,0)">"."</span> . <span style="color: rgb(0,0,255)">$Matches</span><span style="color: rgb(102,204,102)">[</span><span style="color: rgb(204,102,204)">1</span><span style="color: rgb(102,204,102)">]</span> . <span style="color: rgb(255,0,0)">"."</span> . <span style="color: rgb(0,0,255)">$Server</span>;
<span style="color: rgb(0,0,255)">$Resolved</span> = <a href="http://www.php.net/gethostbyname" target="_blank"><span style="color: rgb(0,0,102)">gethostbyname</span></a><span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$ServerHost</span><span style="color: rgb(102,204,102)">)</span>;
<span style="color: rgb(177,177,0)">if</span> <span style="color: rgb(102,204,102)">(</span><span style="color: rgb(0,0,255)">$Resolved</span> != <span style="color: rgb(0,0,255)">$ServerHost</span><span style="color: rgb(102,204,102)">)</span>
<span style="color: rgb(102,204,102)">{</span>
<span style="color: rgb(0,0,255)">$Result</span> = <span style="color: rgb(0,0,0); font-weight: bold">TRUE</span>;<span style="font-style: italic; color: rgb(128,128,128)">//GUILTY!</span>
<span style="color: rgb(177,177,0)">break</span>;
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(102,204,102)">}</span>
<span style="color: rgb(177,177,0)">return</span> <span style="color: rgb(0,0,255)">$Result</span>;
<span style="color: rgb(102,204,102)">}</span>
<span style="font-style: italic; color: rgb(128,128,128)">//-----------------------------------------------------------------</span>
</div>
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