Network "NAT" mode and connect to the VM.

[hack3rcon]

Hello,
I installed a Linux VM on VirtualBox and the network setting is "NAT". I defined port forwarding and can connect to my VM via the Putty, but I want to scan my VM from Windows via Nmap. Is it possible via "NAT" ?
When I used "127.0.0.1" as target in the Nmap then it scan my host OS and not guest OS.

Thank you.

[scottgus1]

If you can 'Nmap' one PC from another PC then
    if you can Nmap through a router then
        open ports in NAT required by Nmap
        Nmap-scan other PC via 127.0.0.1:portnumber
    end if
end if

Virtualbox Networks: In Pictures: NAT

[hack3rcon]

If you can 'Nmap' one PC from another PC then
    if you can Nmap through a router then
        open ports in NAT required by Nmap
        Nmap-scan other PC via 127.0.0.1:portnumber
    end if
end if

Virtualbox Networks: In Pictures: NAT

I did it too but Nmap can't see my VM:

VB-1.PNG (33.55 KiB) Viewed 1589 times

I can ping the VM:

VB-2.PNG (12.59 KiB) Viewed 1589 times

But Nmap can scan the VM:

VB-3.PNG (5.84 KiB) Viewed 1589 times

What the problem?

[scottgus1]

First, if you are using plain NAT, the 'Pictures' tutorial will have informed you that you do not need to put host IP address or guest IP address in a NAT port forward. Added but unnecessary information may cause trouble.

If you can ping either way over a Virtualbox network, then the network is working and other programs' settings are interfering.

You are essentially trying to Nmap a computer behind a router from another computer on the internet, and you have control over the router.

Virtualbox is only providing the router and the target computer. Ask on a Nmap forum how to Nmap a computer behind a router. Apply the same methods to the NAT port forwarding and guest OS.

[hack3rcon]

Thus, in this situation, the only option is using "Host-only Adapter" ?

[scottgus1]

Host-Only is a private channel between host and connected guests. There is no 'router' or port forwarding in Host-Only. No internet either. Anything one can do over a regular network one could do with Host-Only.

[fth0]

But Nmap can scan the VM: [...]

No, it cannot. (Re-)read the content of the picture you posted.

What the problem?

That you don't seem to know how to use NMAP.

Try nmap -p 5060 127.0.0.1.