Suricata It is a famous open source project, as you well know, and it is also available for various platforms, including the GNU / Linux operating systems. It is a project to implement an IDS (Intrusion Detection System), that is, an intrusion detection system. It was developed by OISF (Open Information Security Foundation, and is widely used to monitor servers and systems for possible intruders or to take preventive measures.
Well now it's been released Meerkat 4.0 with some improvements, among which are improvements in intrusion detection capabilities and also in the support of more protocols and options. The first improvement is undoubtedly the most important, since it is the essential functionality of an IDS system, but it is not the only one as I have said. This is the first step towards a more secure future. Additionally, the new software brings a significant improvement to the TCP stream engine under the hood.
For developers, this release makes it extremely easy to expand the detection engine. In addition, a section has been created in the documentation to write rules related to another well-known security project, Snort. The next step in the evolution is 4.0.1, and it will come in a month or so. Then work will also begin on the next major update, 4.1, which is scheduled for late fall this year.
The truth is that the amount of improvements that have been included is much broader, although those were the most remarkable. For more information you can consult the Official Site of the Suricata project. In addition, from there you can also find documentation, and get the project in the download area. By the way, although I did not say it at the beginning, it also includes other functionalities apart from IDS, such as IPS and NSM.