I was looking for way to permit Netbios communication between two servers in different location without VPN.   

Here's what I have found, an easy way to allowed NetBios between two servers using SSH.

SSH allow you to create a tunnel between two machines and forward ports. To tunnel Netbios over SSH, you need to forwards connections on port 139 on the sharing-client machine via SSH to the sharing-provider.

Don't forget, you need to have a SSH server on you sharing-provider.

Here a simple HowTo: 

Sharing-client:

First, you will need to install and configure the Microsoft Loopback Adapter.

Control Pannel / Add Hardware

Select "Yes, I have already connected the hardware".

Scroll down to the bottom of the list, select "Add a new hardware device".

Next, choose "Install the hardware that I manually select from a list (Advanced)".

Select in the list "Network adapters", click next.

In the right pane, select "Microsoft", left pane, select "Microsoft Loopback Adapter".

Then click finish.

Now, we need to configure the Loopback Adapter. Go back to the 

Control panel / Network Connections

Select the newly installed network adapter (You should see a new "Local Area Connection #", where # is its order number, depending on how many network connections you have).

Right click on the selected adapter and choose "Properties". Make sure that "Microsoft Loopback Adapter" is displayed in  "Connect using:"

Disable (uncheck) everything, except for "Internet Protocol (TCP/IP)", see image above.

Select "Internet Protocol (TCP/IP)" and click "Properties". On the General tab, select "Use the following IP address" set it to 

IP address: 10.10.10.10

Subnet mask: 255.255.255.0

On the same tab, click "Advanced". WINS tab, uncheck "Enable LMHOSTS lookup" and select "Disable NetBIOS over TCP/IP"

Click OK, OK, Close.

Second, you will need a SSH client. I use Tunnelier from bitvise which is a great product. Please read the License Terms before downloading. 

Install Tunnelier. Once you're done, launch it.

Login tab, insert your server information, authentication information.

Options tab, Reconnection section select "Always reconnect automatically". On Login section, uncheck "Open Terminal" and "Open SFTP".

C2S Fwding tab, Status "Enabled" Listen Interface "10.10.10.10" Listen Port "139" Destination Host "123.456.789.10" Destination Port "139", where 123.456.789.10 is your sharing-provider external IP.

Click "Login"

Now you should be able to access it:

\\10.10.10.10\your-share-folder

BTW, this can also be done for other ports.

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