Set Virtualbox port fowarding 2 adpaters

[opc0d3]

Hello!

I'm trying to make a lab to analyze malware grant to it internet connection, but with certain rules. I was thinking to make 2 vms, windows lab to do analysis and the middle server linux remnux.

I thought to isolate my windows from host network creating a internal network between remnux and windows. On remnux i would port fowarding (when i grant it) from internal network adpater to nat adapter, so the windows couldn't see my host.
My goal it's to avoid infected machine contacting my host, and on remnux i would set up iptables to block any request but http from windows directly to remote, blocking any lan interaction.

Can anyone help me think in way to do that ?

For now i created remnux with 2 adapters but i have no idea to put a firewall between them.