Snort & Suricata question

  • Hello guys,

    I have a basic question:
    I am toying around with pfSense. Does snort package in pfSense provide a protection against attacks if we use it using the rules/rulesets that exist on their website / or-and if we use with our own rules? Or does it just report?

    If we do not define/use any rules or rulesets in snort, doesn't it provide any protection?

    Same questions go for suricata also.

    Thanks a lot..

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