I'm looking for free IDS that sniffs to traffic in real time.. Can anyone help me !
closed as not constructive by GdD, Lucas Kauffman, symcbean, Terry Chia, M'vy Mar 6 at 14:28
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sophist, similar to your previous question on IPTables more details are required about what OS you are using. This will allow the answers to be specific.
But that said, you should take a look at SNORT. It is pretty much the industry standard open source IDS, its free, you can write custom rules and there is a big community to help out with any issues you may encounter.