gre tunnel tutorial
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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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Ubuntu RADIUS Server Configuration with freeRADIUS | September 3, 2022
Ubuntu Server is one of most popular open-source Linux Server distribution. It is stable and reliable than other Linux distributions. So, enterprise level application can be hosted on Ubuntu Server. Ubuntu RADIUS Server is popularly used for remote authentication and mostly used with the freeRADIUS open source RAIDUS application. freeRADIUS is one of the most popular and powerful AAA (Authorization, Authentication and Accounting) application. Any enterprise (specially ISP company) can use freeRADIUS for AAA solution and can develop billing system. [...]
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How to Recover MikroTik User Password | August 9, 2018
MikroTik Wiki and Forum say that there is no way to recover MikroTik user password without losing MikroTik configuration. But if you have an unencrypted configuration file backup taken before, you will be able to recover your user password using MikroTik password recovery tools. How to Backup and Restore MikroTik configuration file manually was discussed in my previous article. I also discussed how to backup MikroTik configuration file automatically via Mail in another article and in this article I will [...]
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NGINX Web Server Installation and Configuration in Ubuntu | September 7, 2024
NGINX is a feature rich and high-performance software which is mainly used for Web Server. NGINX can also be used as a proxy server, load balancer, mail proxy and HTTP Cache Server. NGINX is a free and open-source software and can be run on Linux, Windows. macOS and other operating systems. NGINX is a single-thread based application. So, it can handle unlimited client requests using asynchronous technique. NGINX processes highly efficient run loops in a single-thread process called workers. Workers accept [...]
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7 Best WiFi Router Brands For Home Or Apartment | September 18, 2021
So, you are deciding to buy a WiFi Router for your home or apartment and finding which brand will be the best WiFi Router for your home. A lot of brands which manufacture WiFi Router for home usage are available nowadays in the market but all brands are not renowned and don’t provide best performance for home usage. So, before going to buy a WiFi Router, you should have better understanding about Best WiFi Router Brand that provides best WiFi [...]
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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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Virtual Web Hosting with Apache on CentOS 7 (Name Based) | July 15, 2019
Virtual Hosting is a method of hosting multiple domains on single server. If you have multiple domains (such as domain1.com, domain2.com and so on) and want to host on a webserver, Virtual Web Hosting is your right choice. Apache web server provides an easy way to manage Virtual Hosting. Virtual Hosting can be either Name Based or IP Based. In Name Based Virtual Hosting, multiple domains can be hosted on single IP address. On the other hand, in IP Based [...]
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MikroTik Configuration with PPPoE WAN Connection | July 18, 2018
MikroTik Router is a popular routing device to any network administrator because of having a lot of network features availability. MikroTik PPPoE Client is a special feature that is used to connect any PPPoE Server. If your ISP provides PPPoE connection, MikroTik Router is able to connect that PPPoE Server using PPPoE Client. In my previous article, I discussed how to configure MikroTik Router with static WAN connection and in this article I will show how to configure MikroTik Router [...]
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MikroTik Dual WAN Load Balancing with Failover using PCC | May 27, 2018
Hi geek, going through this article means you are finding Load Balancing as well as Link Redundancy solution for your MikroTik network because you already have multiple WAN connections or you are planning to lease multiple WAN connections. MikroTik has various Load Balancing and Link Redundancy methods such as ECMP, PCC and so on. ECMP method provides an easy configurable load balancing with failover solution but it has some known issues too in a large network. On the hand, PCC [...]
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FreeRADIUS Installation and Basic Configuration on CentOS 7 | November 28, 2018
FreeRADIUS is a modular, high performance and highly customizable open source RADIUS server. Anyone can use FreeRADIUS without any charge and can customize his RADIUS server according to his organizational requirements. In my previous article, I discussed how to install and configure user manager RADIUS server developed by MikroTik. The main disadvantage of user manager RADIUS server is ‘it is not customizable and not suitable for medium or large organization’. On the other hand, FreeRADIUS is giving facility to customize [...]
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