CHR Simple Bridge Difficulties

Hi,

I’m trying to create a simple network between a host computer and an RPi 4 embedded system.
For this I choose Virtualbox with RouterOS CHR running the free license.
I attached 2 network cards to the VM, one bridge adapter for the hardware NIC connected to the RPi 4 and one Host-only virtual adapter for communication between host and CHR.
I have disabled the DHCP Server on the Host-only adapter.

In the CHR I have configured a bridge interface between the 2 available interfaces stated before. Added an address to this bridge interface and setup a DHCP Server.
The Host PC can ping the CHR bridge but cannot reach the RPi 4 which I can see and ping from the CHR.
I can see the lease for the RPi 4 bounded and ping the RPi 4 from the CHR.

Shouldn’t the RPi 4 be reachable for the host and vice versa?

Current configuration:

# 2024-01-23 20:40:43 by RouterOS 7.13.2
# software id = 
#
/disk
set slot1 slot=slot1 type=hardware
/interface bridge
add name=bridge1
/ip pool
add name=dhcp_pool0 ranges=192.168.56.2-192.168.56.254
/ip dhcp-server
add address-pool=dhcp_pool0 interface=bridge1 name=dhcp1
/interface bridge port
add bridge=bridge1 interface=ether2
add bridge=bridge1 interface=ether1
/ip address
add address=192.168.56.0/24 interface=bridge1 network=192.168.56.0
add address=192.168.56.2/24 interface=ether1 network=192.168.56.0
add address=192.168.56.3/24 interface=ether2 network=192.168.56.0
/ip dhcp-client
# DHCP client can not run on slave or passthrough interface!
add interface=ether1
/ip dhcp-server network
add address=192.168.56.0/24 gateway=192.168.56.1
/system note
set show-at-login=n

Thanks in advance for any input.


**UPDATE:**Refering to VirtualBox documentation the Host-only adapter is not meant to be used to forward communication I ended up using the CHR as a simple DHCP server, activating the IPv4 stack on the host for the bridge interface and using that same interface as bridge.