Re: OpenVPN for retro network

Gert Doering <[email protected]> Fri, 23 Feb 2024 13:17:38 +0100

Newsgroups	gmane.network.openvpn.user
Message-ID	<[email protected]>

Hi,

On Thu, Feb 15, 2024 at 08:58:28PM +0000, shadowbladeee via Openvpn-users wrote:
> Before I spending more time on this can OpenVPN 2.6.3 bridged network transport all these? I would like to bridge those old VMs just like they would be on a local LAN.

"I don't know", and I'm afraid that's the best you'll get.

OpenVPN "--dev tap" will usually bridge Ethernet traffic around just fine
(for example on linux, bridge "tap0" and "eth0" together via brctl), but
I'm not sure how Linux in general and OpeNVPN in particular will deal
with odd ethertypes.

> If not what else solution can you recommend? One end on that server must be software only, can be some old cisco vpnc with a cisco appliance on the other end or kame ipsec etc.

IPSEC & friends and anything that is "layer 3" will not handle this.

Linux has (or had?) "gretap" tunnels, which basically also does remote
ethernet, only over GRE not over OpenVPN, and then you can hook said
gretap intreface into a bridge.  This would take OpenVPN out of the 
equation (in case OpenVPN is refusing cooperation), but still relies
on linux + bridge handling unusal ethertypes correctly.

Keep us informed! :-)

gert
-- 
"If was one thing all people took for granted, was conviction that if you 
 feed honest figures into a computer, honest figures come out. Never doubted 
 it myself till I met a computer with a sense of humor."
                             Robert A. Heinlein, The Moon is a Harsh Mistress

Gert Doering - Munich, Germany                             [email protected]

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