OPNsense is an open-source firewall and routing platform based on FreeBSD. Here are some common use cases for OPNsense: Network Firewall: It's primarily used as a robust firewall to protect networks from unauthorized access and potential threats. Router: OPNsense can function as a powerful router, managing traffic between different network segments. VPN Server: It supports various VPN protocols, allowing secure remote access to networks. Intrusion Detection/Prevention System (IDS/IPS): OPNsense includes Suricata, which can monitor network traffic for suspicious activity. Load Balancer: It can distribute network traffic across multiple servers to ensure optimal resource utilization and availability. Proxy Server: OPNsense can act as a proxy server, filtering and caching web content. Captive Portal: Useful for guest Wi-Fi networks in businesses, hotels, or public spaces. Traffic Shaper: It allows for bandwidth management and prioritization of certain types of network traffic. Multi-WAN / Failover: OPNsense can manage multiple internet connections for increased reliability. DNS Server and Ad Blocker: It can function as a local DNS server and block ads at the network level. Network Monitoring: OPNsense provides tools for monitoring network performance and usage.