-u <user> this user should be able to use the tun device
-g <group> this group should be able to use the tun device
-b <bridge> if given, all tun/tap devices are added/removed from the bridge
-u <user> this user should be able to use the tun device
-g <group> this group should be able to use the tun device
-b <bridge> if given, all tun/tap devices are added/removed from the bridge