Mise en place d’une sécurité réseau basé sur le pare-feu OPNsense

Abstract

The corporate network, commonly referred to as the LAN (local area network), is the foundation of the WAN (wide area network), making its mastery a sine qua non for any network administrator. To ensure its smooth operation, it must be protected against any intrusion attempts, which can cause huge problems, such as the failure of LAN servers, leading to a shutdown of LAN services. The firewall is one of the solutions that can help alleviate this problem. So our proposed solution is a firewall system called OPNsense, an open source firewall offering some interesting features. We set up a local area network consisting of an authentication server to authenticate users wishing to access the Internet via a captive portal, a mail server to guarantee the exchange of messages within the network, and the OPNsense firewall, deployed as an intrusion prevention and detection system. We also implemented a number of filtering rules and restrictions to better control users. The tests carried out in this work validate the proposed solution.