Cannot access GUI from OPT1

[Morozz]

Hello all.
I'm having a frustrating issue getting GUI access from my OPT1 management interface on a new mini-PC. I'm trying to set up a transparent bridge between my modem and my ASUS router, and I've hit a wall with management access. I've tried all the standard troubleshooting steps, but nothing seems to work.
Here's my setup and what I've tried:
My Hardware & Configuration
 * Mini-PC: Intel N150 with 4 Intel 2,5 gbps Ethernet ports.
 * Interfaces:
   * igc0 (WAN): Will connect to modem.
   * igc1 (LAN): Will connect to ASUS router.
   * igc2 (OPT1): Dedicated management port.
 * Router: ASUS GT-AX11000 Pro on 192.168.50.1.
 * Goal: Access OPNsense GUI on igc2 via static IP 192.168.50.254.
What I've Done (and Checked)
 * Initial Setup: I installed OPNsense and assigned igc0, igc1, and igc2 to WAN, LAN, and OPT1 respectively.
 * IP Address: I set a static IP of 192.168.50.254/24 on the OPT1 interface.
 * Physical Connection: My computer is connected directly to the igc2 port.
 * PC IP: My computer has a static IP of 192.168.50.100 on the same subnet.
 * Firewall Rules: I added a pass rule on the OPT1 interface to allow access to This Firewall (self). I even tried a temporary "allow all" rule. I disabled 'reply to'
 * Troubleshooting:
   * I ran ping 192.168.50.254 from my PC; it fails with 100% pack. lost.
   * I ran ping 192.168.50.100 from the OPNsense shell; it also fails with 'host is down' msg.
   * I've confirmed the physical link lights are on.
   * GUI is listening to ALL devices.
   * I tried a dry fit test leaving everything on 192.168.1.1 and setting up the OPT1 on static 192.168.1.254. No luck as well. GUI works from 192.168.1.1 but not from 192.168.1.254.

My Problem:

Despite what seems to be a correct configuration, there's no communication between my computer and the OPNsense box on the OPT1 interface. The ping failure suggests it's not a firewall issue but a more fundamental problem.
Any help would be greatly appreciated! Is there a common issue I'm missing with these Intel NICs?

[passeri]

You said the ASUS is on 192.168.50.1, which is a gateway.
Does the ASUS distribute IP addresses?

192.168.50.254/24 is not a static IP. It is the entire address space from .0 to .255, covering everything else to which you assigned "static" IPs, and the ASUS.

Basically, your IP addressing is up the creek. Which is your DHCP server?

From curiosity, why are you putting the Opnsense in bridge mode anyway, rather than it being the router? What are you gaining over a switch?

I suggest a default router configuration (LAN - WAN - others) with the Opnsense as router and ASUS in bridge mode, assuming the ASUS provides Wireless, else remove it or replace it with a switch.