🔀 Setup a VXLAN between OPNsense and Proxmox
When running a hybrid homelab or datacenter environment, it's often necessary to bridge Layer 2 networks across Layer 3 boundaries—especially between firewall appliances like OPNsense and hypervisors like Proxmox. VXLAN (Virtual eXtensible LAN) is a powerful solution that enables this by encapsulating Ethernet frames in UDP packets.
In this guide, you'll learn how to create a stable VXLAN tunnel between OPNsense and Proxmox, allowing seamless connectivity between VMs and networks across different physical locations or VLANs.
Warning
VXLAN traffic is not encrypted. Always make sure that the traffic between the different systems is properly protected, for example by using a VPN
✅ Prerequisites
Before starting:
- You have a stable connection between the Proxmox Server and the OPNsense firewall
- You have access to:
- the Proxmox Server (SSH and WebUI)
- the OPNsense WebUI