gre tunnel over ipsec

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  • MikroTik Site to Site GRE Tunnel Configuration with IPsec

    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. MikroTik provides GRE (Generic Routing Encapsulation) tunnel that is used to create a site to site VPN tunnel. GRE tunneling protocol which can encapsulate a wide variety of protocols creating a virtual point-to-point link was originally developed by Cisco. GRE is a stateless tunnel like EoIP and IPIP. That means if the remote end of the tunnel goes down, all traffic that was routed over the tunnels will get blackholed. To solve this problem, RouterOS have added ‘keepalive’ feature for GRE tunnels. By default keepalive is set to 10 seconds and 10 retries. GRE adds an outer header mentioning the entry point of the tunnel (SourceIP) and the exit point of the tunnel (DestinationIP) but the inner packet is kept unmodified. GRE tunnel only encapsulates IP packets but does not provide authentication and encryption. GRE tunnel with IPsec ensures IP packet encapsulation as well as authentication and encryption. IPsec usage makes your packets secure but [...]

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    MikroTik WiFi Frequency Band and Channel Width Explanation |   January 10, 2020

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    MikroTik User Manager RADIUS Installation on RouterOS 7 |   July 5, 2022

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    MikroTik VLAN Routing Configuration with Manageable Switch |   July 11, 2018

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    MikroTik HotSpot One to One NAT/Universal HotSpot NAT |   September 27, 2020

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    MikroTik Load Balancing and Link Redundancy with PBR |   March 31, 2019

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    Network Bandwidth and Throughput |   February 17, 2017

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    MikroTik Port Forwarding using Winbox |   July 23, 2018

    MikroTik Port Forwarding or Port Mapping is a NAT application that is used to redirect a request from MikroTik IP address and port number combination to a local IP address and port number. For example, if you have a Web Server or FTP Server in your private/local area and want to access this local server from outside of your local area (from internet/public), you can apply MikroTik port forwarding or port mapping and can easily access your Web Server or [...]

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