Maybe nobody else has answered since nobody knows the answer to your question out of the head. I quick [Google search](http://lmgtfy.com/?q=udp+multicast+gateway) seems to indicate that a gateway might be required for udp multicast which are being used for the DDS discovery. --- [Visit Topic](https://discourse.ros.org/t/no-communication-if-no-gateway-is-set/2915/6) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: