<b>Generic Routing Encapsulation</b> (<b>GRE</b>) is a tunneling protocol used to establish point-to-point connections between remote private networks. GRE tunnels encapsulate data packets in order to route other protocols over IP networks. | <b>Generic Routing Encapsulation</b> (<b>GRE</b>) is a tunneling protocol used to establish point-to-point connections between remote private networks. GRE tunnels encapsulate data packets in order to route other protocols over IP networks. |