virtualbox.org

Gentlemen,

You might say " Samba is out of scope of this forum." Answer : "Not in this case."
I really need a help from you to configure the "Samba 4" using the "Virtual Box".

Here's the situation :

In certain networks where I work , the Samba 4 works , in other does not.
The guest in Virtual box is configured with a network " Host Only" for Samba 4 and other " NAT " for the internet.
The only situation where the samba works on all networks is if I disable the "NAT" network and leave only "Host Only".
That is, apparently the NAT network (which should be isolated from the external network by using it only as a proxy) is suffering from some kind of negative effect in some cases.

Then... Comes the question that is worth a million:

What causes it ?

Believe me, I tried everything and nothing seems to resolve the situation.

Note I: I can not use the guest network with Bridge!
Note II: Apparently this only occurs with Samba 4 as the Samba 3 works on any network!

This has been a really difficult situation to solve and I'm "stuck" on it almost 3 weeks.

Someone is also with this problem ?

I ask you to help! Thanks!

A wild guess : the default route provided by the NAT interface is causing you issues. Check that the packet go out on the proper interface.