Active defense where the tool is placed "inline" to block malicious traffic automatically, dropping packets or resetting suspicious connections.
"SirCat's Tools" is likely a misspelling of , a prominent open-source network security engine. This write-up provides an overview of what the tool is, its primary functions, and why it is a standard in the cybersecurity industry. Overview of Suricata SirCat's Tools
For new users, it is recommended to begin with passive monitoring to understand "normal" network behavior and fine-tune rules before switching to active blocking (IPS). Active defense where the tool is placed "inline"