Master OPNsense Firewall Part 1

Learn how firewalls protect networks and manage traffic, and explore OPNsense, an open source firewall with features like traffic shaping and VPN.

install opnsense by creating a three-interface vm, labeling m0 m1 m2 as land, isp 1, isp 2, and configuring nat, bridge, and ip addresses, then perform guided iso installation.

Configure the OPNsense interfaces, designating m0 for the lan and m1 for the wan, assign static IP addresses, then access the firewall web interface on the virtual machine.

Configure the OPNsense firewall by exploring core components, updating the system, managing users, monitoring traffic, backing up configurations, and configuring time zone and A.P. synchronization.

Configure OPNsense interfaces and IP addressing, set LAN IP and ACB-based addresses for interfaces 1 and 2, test connectivity on Windows VM, and confirm the active gateway and default route.

Learn how to configure firewall rules and port forwarding in OPNsense to expose a Windows web server to the internet, including rule order, NAT rules, and testing.

Configure port forwarding on the OPNsense firewall to send WAN traffic on port 80 to the internal web server, and add a LAN firewall rule to allow it.

Configure multi-WAN failover in the OPNsense firewall by enabling IP monitoring on gateways, creating a gateway group, and updating the default route to use the group for DNS traffic.

Learn to configure OPNsense security services, including IPS intrusion prevention system and its rules, enable alerts, and install ClamAV antivirus for network protection with AV rules and signatures.

Master practical troubleshooting and validation in OPNsense by using ping to test connectivity, trace route to map hops, inspect ARP tables, perform DNS lookups, and check interface statistics.