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Free Download Official OPNsense course DNS & High Availability
Published 4/2026
Created by MA ICT B.V
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Level: All Levels | Genre: eLearning | Language: English | Duration: 12 Lectures ( 2h 31m ) | Size: 4.44 GB
Master DNS, Caching & High Availability on OPNsense with Hands-On Labs
What you'll learn
Understand how DNS works in real networks and the difference between recursive and forwarder DNS
Configure and manage Unbound DNS (DNS Resolver) on OPNsense
Implement DNS Forwarding and understand when to use it
Optimize DNS performance using caching and analyze DNS query behavior
Apply DNS security features such as DNSSEC
Design and deploy High Availability (HA) using CARP on OPNsense
Configure failover for WAN and VLAN environments to ensure network continuity
Implement DHCP in High Availability scenarios
Synchronize configurations between OPNsense firewalls
Troubleshoot DNS and High Availability issues in real-world scenarios
Build complete lab environments to simulate production-ready network designs
Requirements
● Basic understanding of networking concepts (IP addressing, subnets, routing)
● Familiarity with VLANs and basic firewall concepts is recommended
● No prior experience with OPNsense is required (everything is explained step by step)
● A computer capable of running a virtual lab environment (VirtualBox, VMware, or similar)
● Willingness to practice through hands-on labs to fully benefit from the course
Description
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.
Who this course is for
■ Network engineers who want to master DNS and High Availability using OPNsense
■ System and network administrators managing firewall and DNS infrastructures
■ Security engineers looking to implement resilient and secure network designs
■ ISP engineers working with DNS services and redundant network architectures
■ IT professionals who want hands-on experience with real-world OPNsense deployments
■ Anyone preparing to deploy or maintain highly available firewall and DNS environments
■ Students with basic networking knowledge who want to advance into practical networking labs
Homepage
Code:
https://www.udemy.com/course/official-opnsense-course-dns-high-availability
Code:
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