Details on IPS (Suricata)

This is somewhat related to a more specific question regarding the IPS (see here), however more questions on the IPS arise.

Can anyone point me towards a more detailed docu on the IPS used by IPfire?

My IPS does this sometimes:

What is happening during this “Scanned”-spike? And, what does “Bypassed” and “Scanned” mean? What is the FW doing here?
Where is this documented in detail?

Thanks in advance

A post was merged into an existing topic: IPS: Customize actions taken