gre tunnel basics
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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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Unlocking Digital Opportunities: A Beginner’s Guide to Computer Networking | October 14, 2025
Summary Computer networking has created the digital world, enabling communication networks that unite various regions of the world and connect any device in some way or another. Networking provides new opportunities to secure employment, act as freelance workers, or even pursue volunteer work, which is why it is worth investing in for career development. Being practical should be valued even more than theory. Even after setting up a home lab, reviewing real projects, and consulting trusted sources, you will learn [...]
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MikroTik Firewall Basic Concept | October 6, 2017
MikroTik Firewall functions as a network security tool for preventing unauthorized access to networks as well as provides Network Address Translation functionality. So, a network administrator who is using MikroTik Router in his network cannot go a single day without MikroTik Firewall. Actually, the main duty of a MikroTik administrator is to maintain Firewall properly along with Bandwidth management after completing MikroTik Router basic configuration. So, a MikroTik administrator should have enough knowledge on MikroTik Firewall and so this article [...]
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CentOS 8 Installation with Screenshots (Server with GUI) | November 21, 2020
Linux is a free and open source operating system developed by Linus Torvalds on September 17, 1991. It is mainly used as server environment. A lot of Linux distributions are present today. Among them, Red Hat Linux is used as enterprise Linux. Red Hat is also known as Red Hat commercial Linux that means Red Hat is a paid service program. CentOS (Community Enterprise Operating System) is another Linux distribution that provides a free and open source, enterprise-class, community-supported server platform functionally compatible with [...]
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MikroTik Bandwidth and Resource Monitoring with Graphs | January 31, 2018
“Am I getting my committed bandwidth?” is a common question to any network administrator. This question may arise either from your customer or from your owner if you are an employee of any organization. If you feel boring hearing this question and want to establish a system where your customer will be able to inspect his bandwidth usage, MikroTik Graphing is your best friend. MikroTik Graphing can be used to display graphics for traffic which is passed through interfaces and [...]
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Things to Consider When Developing a Mobile App | February 27, 2022
Building a mobile app is one of the best ways to engage your target market and build an audience. If you want to develop a mobile application that will be truly successful, you need to consider every aspect of the development process. At the same time, there are many things to think about when developing a mobile app. Apps are designed to solve problems for people; if you are thinking about creating an app, you need to think about why [...]
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Install MikroTik RouterOS on PC | June 13, 2016
MikroTik is a popular and mostly used router worldwide because of having a lot of networking functionalities and its cheap price. If we buy a MikroTik Routerboard (like MikroTik Routerboard 450G, MikroTik Routerboard 1100 AH etc.), we will find a machine where MikroTik RouterOS is prebuilt but the machine contains limited processing resources such as limited RAM and limited processor core. So, our network could be slow if you use a MikroTik RouterBoard for maintaining a large network. On the [...]
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MikroTik Router Static DHCP Server Configuration | October 25, 2015
DHCP Server assigns IP address and other related IP information (Subnet mask, Gateway and DNS) automatically to network devices. But automatic DHCP Server has some disadvantages too. If any IP device connects to any automatic DHCP network, the device will get an IP address and related IP information automatically by the DHCP Server and the device will start to use resources of this network. In this situation, the network administrator cannot know who is being connected to the network and [...]
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ISP Bandwidth Management with MikroTik PCQ | June 25, 2016
MikroTik is an excellent router for managing ISP Bandwidth. For this, most of the ISPs are now using MikroTik Router for managing client bandwidth. The service used to manage bandwidth in MikroTik RouterOS is QUEUE. There are various types of queue services in MikroTik Router for managing internet bandwidth. Among these, PCQ can specially be used for maintaining ISP bandwidth. In this article, we will see how to manage ISP Bandwidth with MikroTik PCQ. MikroTik PCQ Service PCQ stands for [...]
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MikroTik User Manager RADIUS Installation on RouterOS 7 | July 5, 2022
The User Manager is a MikroTik provided RADIUS Server packages. It can be used to manage users for small or medium level business. User Manger is not a default RouterOS packages. So, we have to install user manager as an extra package in RouterOS 7. RouterOS 7 has brought a massive change on User Manager package. The most important change is managing User Manager from Winbox while in RouterOS 6 the User Manager package can only be managed from Web [...]
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