A lot of chatter is on the DNS exploit that is active at the moment. The majority of servers have been patched however I found a great tool created by IANA on the Blacknight Blog.

Should you wish to check to see if your name servers are exploitable - just type in your domain name on this page and the tool will tell you all you need to know.

I’m happy to see our domains are perfectly patched by the guys in blacknight who take care of our NS needs.

Tool: http://recursive.iana.org/