Practical audit advice you can use today.
# 15 : Protecting DNS Records with Split DNS
What harm is there in having private internal records in your external DNS servers? There are many opinions on this with a number of people saying that there's no real risk involved in exposing this data. In this episode we explore how an attacker could poll your external DNS server to expose this information, what the actual harm could be and how Split DNS solutions solve this problem.
The mapping tool described can be found here: http://it-audit.sans.org/community/downloads
© 2011, David Hoelzer & EnclaveForensics