This sample OpenDaylight module reacts to any new TCP or UDP connection that is to be established between two hosts. Any of the hosts can act as server or client.

For TCP traffic the controller checks if the des- tination port is within the (user-defined) range 5000-6000. If so, flow entries are installed that forward such traffic to port 5050 and handle packets sent back to the client. Otherwise, a "DROP" rule is installed preventing further connections to the target destination port.

For UDP traffic there is no port checking and rules with wildcarded UDP source/destination port are installed into the switch.