IDS Software

I'm starting a project for which I would like some quality IDS
software. IMHO this opens up a whole can of worms, and will probably
start a great discussion, but that's probably good on the whole.

First, the requirements. The IDS system must be:

* Free

* Run on FreeBSD, and/or maybe Linux.

* Allow both 'router' detection (where the host acts as a router)
  and 'passive' (where the host is simply a sniffer on a lan).

* Have a reasonable configuration system to allow common false-positives
  to be supressed.

At this point I know almost nothing about IDS systems, other than
that several companies make such products and charge huge fees for
them, and that there are a number of open-source products that have
no confirmed reputations.

Replies to the list are ok, as are private replies. Assuming I get
something good I will summarize private replies to the list.

Simple question simple answer :slight_smile:

Snort - The Open Source Network Intrusion Detection System

Well, it looks like options are limited, but good. A total of 18
people pointed me to Snort,, with 2 people suggesting

Thanks all.