This official OPNsense course is designed to provide you with in-depth, hands-on knowledge to confidently deploy, manage, and troubleshoot DNS services and High Availability (HA) environments in real-world networks. Throughout the course, you will learn how DNS operates within modern infrastructures and how to configure both Unbound DNS as a recursive resolver and DNS Forwarder services, while understanding key concepts such as caching, performance optimization, and DNSSEC for enhanced security. On the High Availability side, you will build robust and resilient network architectures using CARP, ensuring seamless failover for WAN and VLAN environments, synchronizing firewall configurations, and minimizing downtime during failures. The course also covers DHCP High Availability, allowing you to maintain continuous IP address assignment even in fault scenarios. All topics are delivered through practical, step-by-step labs where you will simulate real network conditions, test failover mechanisms, and validate configurations from client devices, ensuring you gain not only theoretical understanding but also strong practical skills. By the end of this course, you will be able to design and implement stable, secure, and scalable OPNsense deployments suitable for enterprise networks, ISPs, and advanced home labs, making it ideal for network engineers, system administrators, and security professionals who want to master DNS and High Availability using OPNsense in production environments.
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