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Firewall

All Privacy Hardware NAS ZFS Reverse Proxy SWAG Plex Media Server Self-Hosting CrowdSec Fail2Ban Cybersecurity Networking Jellyfin Docker Automation

Digital rendering of my 10+ yr old hand me down Alienware X51 R3 PC running OPNsense, 'ghosting' my WAN IP to the scanners. — Ghosting the Scanners with my 10+yr old hand me down Alienware X51 R3.

Beyond Default Deny: Reducing Attack Surface & Exposure in 2026

Stop Shodan and Censys from mapping your network. Learn how to use OPNsense 26.1, CrowdSec, and Divert Mode to achieve true Security through Obscurity in 2026.

A macro shot in a dark server room shows an Ethernet cable plugged into a NIC, featuring a "Digital Fortress" maintenance log overlay with an OPNsense upgrade progress bar at 88% complete.

Upgrading to OPNsense 26.1

The jump to OPNsense 26.1 changes how DHCP and DNS interact. Learn how to navigate Kea migration, fix subnet mask mismatches, and resolve Android Wi-Fi errors.

Conceptual network command center. Left display: OPNsense 1.5Gbps throughput and low latency. Right display: AdGuard Home stats and active IDS/IPS shield for threat detection. — Total network control, visualized. See your OPNsense throughput, AdGuard Home stats, and real-time IDS/IPS alerts in a sleek, futuristic interface.

Advanced OPNsense Networking: Cloudflare Bypass, DNS/NTP Hijacking & SQM

Learn advanced OPNsense routing techniques including Cloudflare proxy bypass, DNS/NTP interception, and SQM bufferbloat fixes for high-performance homelab networks.

A glowing digital scanner performing deep packet inspection on a high-speed data stream, destroying malicious red packets while clean blue packets safely pass through the network firewall. — Advanced Threat Protection in action: Next-Gen Layer 7 Firewalls (like Zenarmor) and IDS/IPS engines (like Suricata) dynamically scan, filter, and destroy malicious traffic in real-time.

OPNsense Part 3: Layer 7 Control & Threat Intelligence

Secure your OPNsense firewall with next-gen threat protection. Configure Suricata IDS/IPS, Zenarmor Layer 7 filtering, CrowdSec, and GeoIP blocking.

Digitized picture of a lock, floating between racks in a datacentre with digital electronic flows going through it. — OPNsense, keeping you secure.

OPNsense Part 2: Firewall Rules, NATs, and Traffic Flows

Learn how to configure OPNsense firewall rules, VLAN isolation, port forwarding, NAT mechanics, and advanced outbound egress filtering for your homelab.

A digital cybersecurity blueprint showing a glowing orange OPNsense firewall shield protecting a segmented network topology with blue data streams connecting various VLANs. — A logical map of our secure homelab architecture. An OPNsense firewall sits at the core, protecting isolated VLANs from the WAN using segmented routing and default-deny policies.

OPNsense 26.2 Master Guide: Architecture, Hardware & Deployment (2026)

Master OPNsense firewall setup. Build a digital fortress with OPNsense 26.2. This expert 2026 guide covers network topology, hardware sizing, ZFS installation, DNS config and baseline systems hardening.