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Bridged pfsense interface is not responding to ping request and ignoring ping reply

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I have a firewall (pfsense) with the LAN and the DMZ configured as a logically bridged interface in pfsense, to share the same ip address. Currently, it is running in virtualbox, the LAN is a host-only interface and the dmz is a bridged one.

When the firewall ping the ip address of the host, it send ping request, which is responded by a ping response by my computer. But the firewall doesn't acknowledge the responses.

ping: send to: Host is down

When the host ping the firewall, it doesn't respond.

I tried to configure an ip address on the LAN interface and the communication between the host and the firewall work well.

Edit : I checked the configuration, the firewall rules are applied to the interfaces in the bridge virtual interface and not the virtual interface itself. But I did implement a firewall rule allowing the icmp protocol to the DMZ and LAN interface, as well as the Bridge one.

Do you have any idea why the virtual bridged interface of pfsense is not working ?

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