[ale] Remote file systems and tunnels

[Alex Carver]

On 9/16/2013 18:20, Brian Mathis wrote:
> On Mon, Sep 16, 2013 at 7:19 PM, Alex Carver <agcarver+ale at acarver.net>wrote:
>
>> On 9/16/2013 14:21, Brian Mathis wrote:
>>
>>> I've not used it for this, but maybe you should look into setting up a VPN
>>> between the two servers using OpenVPN.  This is essentially the same as
>>> what you're looking at using SSH for, except it would actually be a real
>>> VPN instead of hacking some stuff through SSH port forwards.
>>>
>>>
>> I've never set up a VPN so I'll likely have many questions when I get
>> started.  For example:  if I set up the VPN server on one end and the
>> client on the other then get them connected, is the connection
>> bidirectional such that an initiator (e.g. ssh, browser, etc.) can be on
>> either side or must all connections using the VPN be initiated on the
>> client side of the VPN?
>>
>> As an example, suppose the app server (machine A) is the VPN client and
>> the file server is the VPN server (machine B) so that A initiates a
>> connection to B.  Can an ssh client on B establish a connection to A going
>> backwards from the A->B VPN link?
>
>
>
> In the most basic setup, where you don't mess with routing or anything, you
> wind up with a point to point link between the 2 systems.  Each system gets
> its own IP address which is part of the VPN network (separate from your
> existing subnet).  Each system should be able to connect to the other by
> using the VPN IP address (bi-directional), and no other traffic should be
> routed over that.  As long as you don't set the VPN link as the default
> gateway, it won't affect any other traffic.
>

So then by extension if I have two VPN clients connect to one server all 
three can communicate with each other over the VPN link?