nathaniel
Sorry, I should have provided more info.
I use bridge utils to emulate a bridge at each end of the connection. The tun-device is connected to this bridge, and also some other devices. Since there is only one tun-device in the vpn-server I got the impression that the emulated bridge where the device is connected to already does the magic and makes the clients see each other. Apparently not.
The reason for my question is that I see connection issues from one client to the other. If it would have made no difference for bridged vpns, I could have concentrated on firewall rules or something like that. As this is a productive system, I don't wan't to "just try it".
So, with this setup using the bridge utils, will client-to-client make a difference?
Bonus question: When I add the parameter, can it have a negative effect? E.g. when I just try it out, is there a chance that something bigger will break? If it only has an effect on routing setups, will it fail gracefully when I have a bridged network?