$ ping -c1 -p 003dcd53ca8774ac381fd423d1763700 unhack.ca
 
$ curl http://unhack.ca/p/3dcd53ca8774ac381fd423d17637
 
$ dig 3dcd53ca8774ac381fd423d17637 @unhack.ca
 
$ dig 3dcd53ca8774ac381fd423d17637.ns.unhack.ca
 
C:\> nslookup 3dcd53ca8774ac381fd423d17637 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/3dcd53ca8774ac381fd423d17637">]>
    <foo>&xxe;</foo>
Waiting for ping...