On 23.6.20 20:34, R.Wieser wrote:
> Hello all,
>
> I've got a few computers in seperate subnets which I do not allow to
> communicate with each other.
> When I need to transfer data between computers in those subnets I use an USB
> stick.
>
> Somehow my thoughts went to if it would be possible to use an RPi 3B+ as a
> kind go-between.
>
> The first problem would be that I would need to add another (or more)
> ethernet connection (so the 'puters on one subnet cannot reach 'puters on
> the other one).  Is that at all possible (at a usable speed) ?
>
> The second would be to how to transfer data from one subnet to the other.
>
> For that I could imagine a kind of "post office" solution, where 'puters on
> both subnets can leave messages for each other and ofcourse read each others
> replies, but never directly talk to each other.  (both 'puters connect to a
> known port on the RPi).
>
> Does anyone know if such a sulution or project (and tutorial?) for such a
> thing exists ?
>
> Regards,
> Rudy Wieser


You can use a VLAN capable switch to extend the Ethernet into
separate virtual LANs. The Linux box has to be connected to
a switch port trunked to both VLANs.

I'm using Zyxel GS-1200 switches to expand the Pi Ethernet port
to several outputs. Their cost was pretty reasonable and the
VLAN setup goes easily with Web interface.

--

-TV

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