I don't know how many times I suggested that potentially DNS was hacked to various companies where weird things were happening....and they blew me off like I was nuts. Like there's no way DNS can be hacked. Right.
http://www.networkworld.com/news/2007/041307-dns-vulnerability.html?nlhtsec=0416securityalert1&company=Mu%20Security
The question is, what's the fastest way to pinpoint if your DNS server is hosed?