druck wrote:

> The OP hasn't stated exactly what applications and/or protocols are
> required for this "post office", but if files are sufficient, you could
> use OwnCloud (roll your own Dropbox). This would allow files to be kept
> synchronised between machines but with no direct network connection
> between them. The Pi runs the OwnCloud service and accepts connections
> from each network interface, but does not route any data between the
> interfaces.

That's the closest suggestion I've heard so far to using something that
already exists, rather than implementing a roll-your-own solution ...

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