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Learn How to Deploy OPNsense on a Rad Web Hosting VPS! This guide demonstrates how to deploy OPNsense on a Rad Web Hosting VPS. This guide is tailored specifically for Rad Web Hosting VPS infrastructure, including /32 IP addressing, KVM virtualization, and ISO-based installs. What is OPNsense? OPNsense is a free, open-source firewall and routing platform designed for network security, traffic control, and perimeter defense. It is based on FreeBSD and is widely used as a modern alternative to proprietary firewalls and legacy open-source solutions. What Works Best on Rad Web Hosting Rad Web Hosting VPS nodes provide: KVM virtualization Custom ISO boot VNC console access Static IPv4 (/32) Optional IPv6 /64 High-performance NVMe storage This makes Rad VPS well-suited for OPNsense when configured correctly. Recommended VPS Plan (Minimum) Resource Recommended vCPU 2 cores RAM 2–4 GB Storage 20+ GB NVMe NICs 1 (default) IPv4 1× static /32 IPv6 Optional /64 Dual-NIC OPNsense is not required on Rad VPS. A single-NIC routed firewall model is preferred. Network Model (Rad-Optimized) ✅ Single-NIC Routed Firewall (Recommended) Interface: vtnet0 WAN + LAN handled on same interface OPNsense acts as: Edge firewall VPN gateway Policy router LAN is logical, not physical (VPNs, VLANs, or routed subnets). How to Deploy OPNsense on a Rad Web Hosting VPS Download OPNsense ISO Collect the DVD ISO download URL: https://opnsense.org/download/ Select: Architecture: amd64 Image type: dvd File system: UFS Upload the ISO in the Rad Web Hosting VPS panel. Create the VPS (Rad Panel) In the Rad VPS panel: Create a new VPS Choose Custom ISO Select the uploaded OPNsense ISO Enable VNC console Disable Rad-side firewall (temporarily) Power on the VPS. Install OPNsense From the VNC console: Select Install (UFS) Accept defaults Select disk: vtbd0 Use Auto (UFS) Confirm install Set root password Reboot and detach ISO Interface Assignment (Rad VPS) From the console menu: 1) Assign interfaces Assign: WAN → vtnet0 LAN → none (single-NIC setup) Confirm and continue. WAN IP Configuration (Critical for Rad VPS) Rad Web Hosting uses static /32 addressing. From console: 2) Set interface IP address Example Configuration Configure WAN via DHCP? → No IPv4 address → YOUR_ASSIGNED_IP Subnet mask → 32 Gateway → RAD_GATEWAY_IP IPv6 → Optional ⚠️ Gateway is mandatory on /32 IPs Rad will provide the correct gateway in the VPS details panel. Access the Web UI After configuration: Web UI: https://YOUR_VPS_IP Username: root Password: (set during install) If blocked: Console → 11) Reload all services Initial Web Setup Wizard Complete: Hostname (example: fw01) Domain (example: rad.local) DNS servers Timezone Confirm WAN config Change admin password Firewall Rules (Rad-Safe Defaults) WAN Rules (Highly Recommended) Allow management access only from your IP: Action: Pass Interface: WAN Source: Your_Public_IP Destination: This Firewall Port: 443 Optional: SSH (TCP 22) with key-only auth ❌ Do not allow WAN → Any NAT Configuration (Rad Default) Navigate: Firewall → NAT → Outbound Set: Automatic outbound NAT This works perfectly for: VPN clients LAN subnets IPv6 NAT-less routing Rad VPS Performance Tweaks Disable Hardware Offloading System → Settings → Networking Disable: Hardware checksum offloading Hardware TCP segmentation Hardware large receive offloading This prevents packet drops on virtual NICs. Optional Rad VPS Enhancements WireGuard VPN gateway Site-to-site tunnels Bastion firewall IPv6-only LAN with NAT64 HAProxy reverse proxy GeoIP blocking Suricata IDS (light ruleset) What OPNsense Is Best Used for on Rad VPS ✅ Excellent: VPN concentrator Secure edge firewall Jump host protection Remote access hub Traffic filtering High-PPS DDoS mitigation ❌ Not ideal: Hardware offload use Multi-WAN CARP HA Final Notes OPNsense runs extremely well on Rad Web Hosting VPS when configured using: Single NIC /32 routing Automatic NAT Tight WAN rules Conclusion You now know how to deploy OPNsense on a Rad Web Hosting VPS.

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