Virtualbox and Gufw Firewall

[HardTrickySecurity]

Can I block incoming and outgoing traffic with gufw installed inside my guest and block also at the same time my host incoming and outgoing traffic?

In other words can I block incoming and outgoing traffic in guest and host using only gufw installed inside guest?

So far I can block guest internet traffic but I can not block host internet traffic.

Should I use bridge or nat, what excatly should I use in this scenario.