What is Gre-Tunneling? How to deploy it?

Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco Systems that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links or point-to-multipoint links over an Internet Protocol network. Here we are going to discuss the communication between public to private IP. (Cloud server and Mikrotik/NAS with private IP)
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