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Hello everyone, I'm setting up a local lab environment using VirtualBox on an Arch Linux host.
The virtual machine has been configured with the following specifications:
General:
Name:
FW-OPNsense-25.7
Operating System: FreeBSD (64-bit)
System:
Base Memory:
4096 MB
Processors:
2
Boot Order:
Floppy, Optical, Hard Disk
Acceleration: Nested Paging
Display:
Video Memory:
Scale-factor:
Graphics Controller:
Remote Desktop Server:
Recording:
Storage:
Controller: IDE
16 MB
2.00
VMSVGA
Disabled
Disabled
IDE Primary Device 0: FW-OPNsense-25.7.vdi (Normal, 50.00 GB)
Audio:
Host Driver: Default
Controller:
ICH AC97
Network:
Adapter 1: Intel PRO/1000 MT Desktop (NAT Network, 'NatNetwork')
Adapter 2: Intel PRO/1000 MT Desktop (NAT Network, 'Management')
Adapter 3: Intel PRO/1000 MT Desktop (NAT Network, 'Clients')
USB:
USB Controller: OHCI, EHCI Device Filters: 0 (0 active)
Shared folders:
None
Description:
None

The networks are:
WAN -> NatNetwork
LAN -> Management
OPT1 -> Clients

For some reason the network i have connected to adapter 3 never works,
I tried deleting and creating fresh networks with different IP ranges several times and it never works,
It seems like what ever the network that is configured as OPT1 never works [WAN & LAN networks work fine].

When i boot up a machine in the clients network i get an APIPA IP address.
The OPNsense web GUI confirmed that DHCP was enabled and the IP ranges were correctly configured.

What's the source of this problem, and what is the recommended fix?