At times, it is economical to build a VPN tunnel with the available networking resources. For example, if you have a VPN concentrator and you need to connect a small office securely with your network, you can do so by installing a low priced Cisco router in the remote office. This post will demonstrate how you can build VPN using a VPN concentrator and a Cisco router. [Read more…]
By reading this post you can learn about VPN and its workings. VPN is just a term we use to describe a system which makes communication between two computers, regardless of how far they are, within a secure channel. Here the secure channel means you can convert the public network secure. As you know that a public network is nothing but the Internet, where can have access to any serve to get the required information.
So, A VPN is such a technology where you need to have two computers, both of which can be located in separate towns or countries, and an encryption technique to start a secure communication between the channels. The function of the encryption mechanism is to make the data or message encrypted so as no can in the Internet can decipher your message. If no one understands what you are talking to your friend residing in a different country, then you can say that your network is virtually private- this is why we call it VPN (virtual private network). [Read more…]
VPN is a trusted and secure network, which use tunneling and protocol(PPTP,L2TPIPSec) to make data transmission through the public network.
RAS: remote access service used to access server remotely from client terminal using dial-up connection.
IAS:Internet authentication service is used to remotely and centrally manage all RAS server and keep remote access policy centrally in a single location. [Read more…]
How to Configure VPN in Cisco Routers
Virtual private network can be configured with most of the Cisco routers( 800 to 7500 series) with IOS version 12 or higher.VPN can be implemented in a number of ways–with various level of security measures and configuration. To determine the right VPN configuration for your network, you need to have a solid understanding in cryptographic system and encryption algorithm.Besides, one needs to know which type of VPN is suitable for remote clients and which type of VPN is used to create secure site-to-site connection. This article explains the necessary steps with configuration script to setup VPN in Cisco routers. This configuration can be simulated in Cisco packet tracer software as well. [Read more…]