OPNSense Update & Plugins

Next I update OPNSense and install the QEMU Guest Agent.
This is important because otherwise proxmox cannot shutdown the OPNSense when proxmox needs to reboot.
You also would not be able to stop OPNSense from Proxmox manually or restart it if the QEMU Guest Agent is not installed.

Updating OPNSense

Caution

If the following steps do not work, or if nothing is displayed under System > Firmware > Status after five minutes, you should check your Internet connection.
It may be that your OPNSense does not have Internet access to update the system.

Then it is best to check your Internet settings that you have set under Configure OPNSense.

You should regullary update your OPNSense because it handels most of your server traffic and its the most vulnerable point of your server.
I would suggest running updates at least once a week or if you dont run critical stuff on your server atleast once in a month.

• Go to System > Firmware > Status
• Should be able to Check for updates (It should redirect you to the Update-Tab.)
• Scroll down and click Update#
• Confirm by clicking Ok

After that OPNSense should automatically download and install the updates. Sometimes OPNSense will need to restart after certain updates.
Sometimes it will update the packages inplace. If you are using localhost to connect via SSH Tunnel you may need to disable the firewall after that again.

Installing QEMU-Guest-Agent

We need to install the QEMU-Agent Plugin to OPNSense.
As I already mentioned we need this plugin for the communication between our server (Proxmox) and opnsense.

To install the QEMU Quest Agent you need to head to the Plugins section System > Firmware > Plugins.
There you will have to search for os-qemu-guest-agent and click the plus icon on the right.

This will install the QEMU-Guest-Agent.

In some cases the QEMU-Guest-Agent will not start automatically. You can check if it is running under Lobby/Dashbaord.
You should be able to see the QEMU-Guest-Agent in the Services Section. If it has a red stopped icon you can click the play button to start it.
After that the icon should turn green, indicating that the QEMU-Guest-Agent is running.

Congratulations you have now installed opnsense on your server and configured the necessary things for further use!