Re: host sensors needed?

As I am sure you could have predicted, my answer is that it depends. Ther=
e are more security options available in a HIDS solution that you won't f=
ind when using the tools that you mention in your post such as being able=
 to do behavioral analysis of the software executing on the server. For e=
xample, you can deny certain executables from running in a directory wher=
e it isn't expected, block all executables from running in temp directori=
es, home directories, etc. As with any software there is a learning curve=
 so it is best to start out with HIDS running in "learning" mode which yo=
u can tune over time.=20
When looking at defense in depth, go for a mixture of signature-based (ID=
S, AV) along with heuristic or behavior-based tools. Hope this helps.

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