Cool program. Version 4.1.3 is ready up to now. Just add its' stable repository, address is here: "https://suricata.readthedocs.io/en/suricata-4.1.2/install.html", and install the program. Some says Suricata doesn't start at boot. But it's wrong. Add it to system start-up by this command: "sudo /lib/systemd/systemd-sysv-install enable suricata". And don't forget to make your "rules" file! You can compile it from huge pack of "rules" attached to installation pack, or write it yourself.