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OPNsense in EVE-NG, already installed

OPNsense is in the Add Node list of every CloudLabBox workspace, ready to add to a lab. Practise firewall rules, NAT, VLANs, VPNs and intrusion detection on an open-source firewall.

Choose a planCheck it in the free demo

Vendor
OPNsense
In Add Node
10 images
Template
opnsense
Newest
opnsense-25.1

Installed versions

Every OPNsense name in the Add Node image list, exactly as you’ll pick it.

Template opnsense

OPNsense

10 images on this template. Newest first.

  • opnsense-25.1
  • opnsense-24.7
  • opnsense-24.1
  • opnsense-23.7
  • opnsense-23.1
  • opnsense-22.7
  • opnsense-22.1
  • opnsense-21.7.1
  • opnsense-21.1
  • opnsense-20.1

Add it to a lab

In Add Node, choose the template, then the image. The template fills in these settings; change them before you start the node.

Add Node defaults for OPNsense, read from the EVE-NG templates on 28 October 2026
ImageTemplateCPURAMInterfacesConsole
OPNsenseopnsense12048 MB4 interfaces: vtnet0 to vtnet3VNC

EVE-NG admits a node by the CPU and RAM set on it, so a running node counts against your plan at these values. This template starts nodes at 1 vCPU and 2,048 MB, which fits the free demo’s 6 vCPU and 8 GB, so you can start one there and open its console.

See default usernames and passwords Read every node tip

VLAN routing on OPNsense with an IOSvL2 switch

Trunk two VLANs from an IOSvL2 switch to OPNsense, with an Alpine Linux host in each, then route and filter between them. You practise VLAN interfaces, DHCP and firewall rules.

  • 1×OPNsense opnsense1 vCPU, 2048 MB
  • 1×IOSvL2 viosl21 vCPU, 1024 MB
  • 2×Alpine Linux clbalpinebase2 vCPU, 512 MB each

Added with these defaults, the lab uses 6 vCPU and 4 GB of RAM. The smallest plan that fits is Lite, with 6 vCPU and 8 GB: £3 a day, or £0.50 an hour On-Demand.

Choose a planGive nodes more CPU or RAM and you add that instead.

Licences are yours to bring

OPNsense is open-source software, so it needs no licence key. CloudLabBox doesn't supply the paid OPNsense Business Edition.

The images run only inside your CloudLabBox workspace; they aren’t available to download.

Questions about OPNsense

What is OPNsense?

OPNsense is an open-source firewall and router based on FreeBSD, forked from pfSense in 2014 and managed from a web interface.

What are the OPNsense interfaces called?

EVE-NG labels them vtnet0 to vtnet3, the VirtIO names OPNsense uses, so the labels match what you assign as WAN, LAN and optional interfaces.

Which console does an OPNsense node open?

VNC, as set by the opnsense template. Sign in there to assign interfaces and set the LAN address before you move to the web interface.

Which OPNsense images are installed?

10 images, all listed on this page exactly as Add Node shows them. The newest is opnsense-25.1.

How much CPU and RAM does a OPNsense node use?

When you add one, the opnsense template adds 1 vCPU and 2048 MB of RAM. You can change both in Add Node, and your plan counts what each running node is set to.

More images

CloudLabBox is independent of the vendors named on this page. Their names identify the images in the workspace’s Add Node list.