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Yes, there are IDS's which carry out not only pattern-matching (known bad behaviour) but also heuristic analysis (looks like bad behaviour, or doesn't look like good behaviour) As a layer, they are e …

You typically have two kinds of IDS, network-based and host-based, and these can be signature or statistical response types. Signature IDS's are simple, fast, and can be updated easily. … Also have a look at this question - some discussion on anomaly based (statistical) IDS. …

I'm not certain it will automatically, as its core purpose is real-time alerting and active response. In saying that, you can run manual log analysis on any log file. The instructions at http://ossec …

Have in the past used a MikroTik as router and firewall, and a Mini-ITX running Snort and some more intelligent filtering than the basic MikroTik box. Don't know what the total power consumption was, …

They are focused on the snort engine, but much of the discussion which isn't around configuring snort should be applicable to many IDS implementations. …

As per my answer on your other post - have a look at the anomaly detection stuff over on the Snort forums. There are many aspects you will need to consider so try building on the work they have alread …

IDS can cover deep packet inspection, or a simple look at connection types, or anything in between. You can have Network IDS or Host IDS, depending on what you want to focus your attention on. … Signature Based Detection does not require any deep packet analysis - it is simpler and faster than DPI (which can also be known as Stateful Protocol Analysis) There is no one-to-one relationship between IDS …

By definition, that is a NIDS. That may or may not be enough for your project. What is possibly more important for a real world NIDS is how it is updated, how is is tuned, how it is managed, how it r …

You need to select your IDS location based on what you need. … Crown Jewels: locate your IDS on the subnet your key assets are on, this way you only see traffic that has got this far - so tuning out false positives should be much simpler. …

IDS can also work on IP source, destination and other factors, so those will still work on SSL. … If you have provided your IDS with private keys so it can decrypt, or in fact if your SSL endpoint is at the proxy then you can do content inspection as well. …

The organisations that have this down to a fine art are the global Security-As-A-Service companies. They are the only players big enough to hook into ISP's, Fortune 350's etc. They also work well with …

In addition to Scott's post which has excellent technical guidance, on the policy side ensure you have a risk register or at least some type of risk classification for each of the assets on your netwo …

While there are some IDS/IPS devices which are marketed as 'minimal' setup, in reality IDS is one of the most setup-intensive devices in a typical network. …

The way to look at which is better for you is to work out what your risk appetite is. If you must have service at all costs then you don't want to fail closed, as any problem with that IPS will cause …

Yes, configured and used correctly, an IDS or IPS will increase security for any user. …