What is a GRE tunnel and how does it differ from an IPsec

MikroTik Site to Site GRE Tunnel Configuration with IPsec | March 26, 2018. VPN (Virtual Private Network) is a technology that provides a secure tunnel across a public network. A private network user can send and receive data to any remote private network using VPN Tunnel as if his/her network device was directly connected to that private network. New to juniper and setting up a site-to-site IPSEC tunnel. Looking to use Route Based, and I see I have to setup a Secure Tunnel Interface (st0.x). I have been searching for hours to determine how the st0.x interface gets assigned an IP. The few diagrams I have seen show it a separate subnet not used on either side of the site-to-site tunnel. Tunnel Services Overview, Tunnel Interfaces on MX Series Routers with MPC7E-10G, MPC7E-MRATE, MX2K-MPC8E, and MX2K-MPC9E What is the IP address inside of the GRE tunnel used for? a. The GRE tunnel peering point. b. The IPsec tunnel peering point. c. The routing protocols peering point. d. The management interface of the router. e. There is no IP address inside of the GRE tunnel. 8. Which option must be configured if a backup secure GRE tunnel is configured? a In this lab, you will configure an unencrypted point-to-point GRE VPN tunnel and verify that network traffic is using the tunnel. You will also configure the OSPF routing protocol inside the GRE VPN tunnel. The GRE tunnel is between the WEST and EAST routers in OSPF area 0. The ISP has no knowledge of the GRE tunnel.

What is GRE? Generic Routing Encapsulation, or GRE, is a protocol for encapsulating data packets that use one routing protocol inside the packets of another protocol. "Encapsulating" means wrapping one data packet within another data packet, like putting a box inside another box.

GRE tunnels provide workarounds for networks with limited hops. GRE tunnels connect discontinuous sub-networks. GRE tunnels allow VPNs across wide area networks (WANs). While GRE provides a stateless, private connection, it is not considered a secure protocol because it does not use encryption like the IP Security Encapsulating Security Payload , defined by RFC 2406. Generic routing encapsulation (GRE) provides a private, secure path for transporting packets through an otherwise public network by encapsulating (or tunneling) the packets. GRE tunneling is accomplished through tunnel endpoints that encapsulate or de-encapsulate traffic.

GRE tunnels are usually configured between two routers, with each router acting like one end of the tunnel. The routers are set up to send and receive GRE packets directly to each other.

Apr 16, 2012 Solved: how can we create GRE Tunnel on Cisco F - Cisco