[NCLUG] Speaking of SSH and Tunnels...

Sean Reifschneider jafo00 at gmail.com
Thu Oct 12 08:33:52 MDT 2017


>
> Speaking of ssh and tunneling, I've been using vtun on Fedora to
> implement a sort of "distributed Ethernet switch over IP" for a
> project, a kind of "layer-2 VPN", if you will.
>

I've done this many times using OpenVPN and tap device bridged to an
Ethernet interface.  I think you can even have multiple OpenVPN clients
connect in to the server, and OpenVPN has a UDP mode so that you don't run
into TCP retransmit amplification like you can with SSH tunnels.

I've used it several times to bridge the networks at two data centers as I
moved machines between them:  Set up bridge, move some machines to the
other location, move the gateway to the new facility, move the rest of the
machines.

Sean


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