🛡️ OPNsense Transparent Firewall Lab

A transparent firewall setup using OPNsense in bridge mode, designed to filter traffic without interfering with existing IP addressing. Ideal for lab testing red/blue team scenarios and monitoring internal network behavior.

🔧 Setup Overview

• Firewall Mode: Transparent Bridge (Layer 2)
• Hypervisor: Proxmox
• Interfaces:
  • WAN: bridged to external internet
  • LAN: bridged to internal lab VM network
• Management: Web UI via Virtual IP (e.g., 192.168.1.5)

💻 Lab Hardware

• 🔧 OPNsense Host: Dell OptiPlex 9020 SFF
  • Intel Core i5-4570 @ 3.2GHz, 8GB RAM, 250GB HDD
• 🖥️ Proxmox Server: Dell PowerEdge R630 (bare metal)
  • Used to host lab VMs: Kali, Windows, Splunk, etc.
• 🌐 Remote Access: MobaXterm (SSH/VNC)

📸 Screenshots

(Add screenshots here: OPNsense dashboard, firewall rules, logs, etc.)

🧪 Lab Equipment

• 🖥️ Host: Windows 11
• 🌐 VMs:
  • Kali Linux (Attacker)
  • Windows 10 (Victim)
  • OPNsense (Firewall)

⚙️ Key Features

• IDS/IPS with Suricata
• GeoIP Blocking
• VLAN-aware filtering
• Logging + Insight with ELK (optional)
• In-line monitoring of real traffic

🧠 Skills Practiced

• Network segmentation & inspection
• Transparent firewall concepts
• Alert tuning and threat detection
• Troubleshooting network flows

🔗 Resources

• GitHub Lab Setup Guide
• OPNsense Documentation

📌 Tags

#portfolio #network-security #opnsense #homelab #firewall