When the result appears, click the “Install” button to start installing Snort. Start by logging into your pfSense system. Make a note of your “Oinkcode” because we’ll use it later in this tutorial. When logged in, click your Username at the top/right of the page and then click the “Oinkcode” button. Confirm your account using the confirmation email they send to you, then sign in at “”. You’ll need to sign-up for a Snort account at “”. You will need a free “enabling” code from “”. We’ll specifically configure the pfSense to detect port scans and block the source. This article walks you through the process. PfSense has the ability to detect and block intrusion attempts. An intruder will often start their intrusion with some reconnaissance which includes scanning the remote system for open ports to learn what services are available. High-end firewall appliances such as those from Watchguard offer the facility to automatically block remote systems based on their behavior such as port scanning.
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