ipsec gre tunnel configuration

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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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    GNS3 Installation and Configuration Step by Step in Windows |   September 14, 2018

    GNS3 (Graphical Network Simulator) is one of the most popular network simulator software used by hundreds of thousands of network engineers worldwide to emulate, configure, test and troubleshoot virtual and real networks. GNS3 supports a large number of vendors such as MikroTik, Cisco, Juniper, Windows, Linux and many other vendors. GNS3 can be installed on Windows, Linux and MAC Operating System. In this article, I will show how to download and install GNS3 application in Windows Operating System. I will [...]

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    How to Separate MikroTik Hotspot and DHCP IP Pool |   October 9, 2020

    MikroTik default Hotspot Setup comes with a DHCP Server (which uses same IP Pool of Hotspot Server) to provide IP address and other network information to a connected device. Using this automatic IP address connected device can access Hotspot login page. After successfully login, a one to one NAT IP address is also assigned for the device and this process happens internally in Hotspot Server. User device cannot know this one to one NAT IP assigning. However, Hotspot Server actually [...]

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    How to Bind Hotspot User to MAC and Static IP in MikroTik |   November 6, 2020

    MikroTik Hotspot is usually a user based Hotspot access controlling system. Internet access and bandwidth can easily be maintained with Hotspot user based system. But sometimes we may require more control on Hotspot system which is not possible only username based system. So, we may need to bind hotspot user to MAC and static IP address. If we can bind hotspot user to static IP address, it is easy to control Hotspot users with MikroTik Router and Firewall. So, in [...]

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    Ubuntu Web Server Configuration with phpMyAdmin (LAMP Stack) |   July 12, 2021

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    MikroTik Load Balancing and Link Redundancy with ECMP |   October 28, 2016

    Load balancing and link redundancy is the main concern to any network administrator. Because, they always want to keep live their network 24/7. If you have multiple WAN connections, you can easily make a load balancing as well as link redundancy network with MikroTik Router. Different types of load balancing and link redundancy are present in MikroTik Router. ECMP Load Balancing is one of them. ECMP is so easy to implement and it provides an perfect load balancing solution. In this [...]

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    Managing Disk Partition with the parted Tool in CentOS 7 |   March 2, 2019

    As a system administrator, sometimes you may require to manage partitions of your CentOS/Red Hat Linux Operating System. Partition management is always a risky task. But there are some useful tools those are so helpful to manage CentOS/Red Hat Linux disk partition easily. In my previous article, I discussed how to manage CentOS/Red Hat 7 HDD partitions with the fdisk utility. The fdisk tool is only eligible to manage MBR partition table. But GPT partition table is now becoming more [...]

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    MikroTik Blocking Websites with TLS Host Firewall Matcher |   April 29, 2019

    Most of the websites now use https and blocking https websites is so much harder with the MikroTik RouterOS version less than 6.41. But from RouterOS v6.41, MikroTik Firewall introduces a new property named TLS Host that is capable to match https websites so easily. So, blocking https websites like Facebook, YouTube etc. can be easily done with MikroTik Router if RouterOS version is greater than 6.41. In my previous article, I discussed how to block websites with MikroTik Router [...]

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    System Restore in Windows 10 |   August 30, 2015

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