I am unable to create a Virtual Lan between Manjaro (Host) and Debian (Virtual Box Guest)

[andutra]

I am trying to create a Debian machine to be my gateway, but when I create this machine at VirtualBox using NAT or Internal Network, I can’t see it at Manjaro (my host machine).
I tried to create a new interface using the same netmask, up this interface but my host can’t “see” my guest machine, I tried to ping, connect via netcat but always I get an unreachable message.
I don’t know if there is something missing to install, my VirtualBox is with the extensions pack, I’ve followed instructions on the wiki to install VirtualBox.
Somebody can help me?
Thanks!

[bogdancovaciu]

NAT on VBox uses the 10.0.2.x IPs, and most likely, if you are connected to a router with your HOST machine, you are on 192.168.x.x IP family.
So, your VBox GUEST will be 10.0.2.x with the Gateway 10.0.2.2 because that is the default address of the virtual DHCP server used in the NAT mode, and will have as primary Nameserver the router you have … That means it will not see your Manjaro, nor Manjaro will see the Debian install as they are not in the same network.

Even though the NAT service separates the VM from the host, the VM has access to the host’s loopback interface and the network services running on it. The host’s loopback interface is accessible as IP address 10.0.2.2 (assuming the default configuration, in other configurations it’s the respective address in the configured IPv4 or IPv6 network range). This access to the host’s loopback interface can be extremely useful in some cases, for example when running a web application under development in the VM and the database server on the loopback interface on the host.

Might do a manual setup for it Chapter 6. Virtual Networking

Or maybe you are probably looking for Bridged Network, usually preferable when your host has 2 NICS …