Virtualbox and opnsense

[pippo_pluto]

Hi everybody, i'm trying to connect an ubuntu VM and another one opnsense(19.1) by using the "Internal network" mode of VBox but they don't communicate with ping and I suppose they can't. To understand better, I used also nmap to see if Ubuntu "looked" the opnsense but it didn't work. Just to clarify, I used the same procedure to connect UBUNTU and a Kali VM, they communicate perfectly. Is there something I'm wrong? Thank you in advance.

[bartjsmit]

Make sure you allow RFC 1918 addresses on the WAN side of OPNsense. Interfaces, WAN, untick 'Block private networks'

Bart...