Is it mandatory to use a firewall if I employ an IDS or IPS?

18 March 2024 1 8K Report

1. Limited budget

2. the data being protected does not contain highly sensitive

TLDR: While technically feasible to have IDS/IPS without a firewall, it's not advisable.

If budget is a concern, open-source tools like Snort, Suricata, Wazuh, and OSSEC are viable options. For a hardware appliance solution, consider vendors utilizing open-source solutions like pfSense, a free firewall compatible with IDS and IPS add-ons.

This setup should suffice considering your threat model.

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