OpnSense doesn't have internet with Proxmox

[wild_wooper]

Hi everyone, I need a bit of help with my opnsense install :3

On my motherboard, I have 3 Ethernet port

Port 1: Wan
Port 2: Lan
Port 3: Unused (this is the port directly on my motherboard, the first two are from my pci device)

I have my modem in bridge mode that is connected to the port 1 on my motherboard. On Proxmox, I created network bridge for the first two port.

I gave my vm the two network bridges and connected an un-managed switch to Port 2. Then I connected my laptop to my switch.

I have access to the GUI of OpnSense, but not the proxmox's one. I also don't have internet.

I tried the same network setup but on baremetal and the internet works. So what could be wrong with my Proxmox install ? :c

[gspannu]

I have a somewhat similar setup.

Proxmox hardware: This has 4 physical ports:
Port1, Port 2, Port 3, Port 4

I have configured it as follows:
Port 1: WAN
Port 2: LAN
Port 4: Management

In proxmox, created the following bridges:
vmbr0: Port 1 (physical WAN port)
vmbr1: Port 2 (physical LAN port)
vmbr2: Port 4 (physical management port)

Address assignments as in screenshot.

Then installed OPNsense GUO using vmbr0 as WAN, vmbr1 as LAN.

OPNsense comes up with router address: 192.168.1.1
in OPNsense, on DHCP, assign a static IP address (192.168.1.254) to Proxmox using its Mac address.

You should now be able to connect to Proxmox GUI using 192.168.1.254 IP address...
 OPNsense GUI will be available at 192.168.1.1