How VPN Works

VPN stands for Virtual Private Network. It is a technology that allows remotely connect to a private network, so that "virtually" connected to that network, as if they were on site and included in the LAN. VPN is useful for remote workers to connect to Office resources, such as internal Web portals, file shares, without having to be physically in the office. In the computer networking notes VPN tutorial, we will take a brief overview of the different types and uses VPN.

There are many different types of VPN protocols and VPN. LAN-to-LAN VPN used to connect multiple networks together. For example, the corporate office May want to have connections to businesses for internal communication and resource access. This allows the edge of the firewall is still blocking out any approach that tries to connect to protected resources, but still allow the VPN connection as being "internal" or have a trusted side of the firewall. IPSec is a set of security protocols that are commonly used for LAN-to-LAN VPN, providing a robust set of different encryption and authentication protocols.

remote workers connect to the remote VPN. These are usually temporary, or "dial-in" connection. Microsoft Windows comes with a PPTP (Point-to-Point Tunneling Protocol) built-in, which provides an easy access way to roll out. However, PPTP relies on a weak encryption protocol, called MS-CHAP, which makes it less convenient choice. IPSec can also be used for remote VPN, using a specific third-party client software, and / or IPv6. SSL VPN's are becoming increasingly popular for remote access VPN, as they provide a secure connection, as well as the easiest option for remote workers. With SSL VPN, remote workers usually apply to HTTPS Web site that allows them to download the app (often Java app), which serves as the client software. After initial installation, customers can usually run an application without a report on the website. SSL VPN can also access the web portal for certain resources without the need for employees to ensure full network connection to a private network.

In addition to obtaining access to remote workers VPN is sometimes used to mask the true identity of the host. This poses a security problem, because a VPN can be used as an encrypted tunnel for transportation of classified information outside the corporate LAN. Modern data loss prevention (DLP) and firewalls do not allow outbound VPN connections are good starting points, but SSL is very difficult to block, given the fact that many legitimate Web sites use SSL secure. VPN services can be subscribed to for masking the host external IP. For example, web site or service may be allowed in the UK, but if someone in the United States connects the UK and the VPN server to browse the site, it seems that in the UK.

To recap, the type of VPN connection that allows remote connection to be treated as if it were part of the local private network. These links can be used for remote individuals or entire remote networks. VPN connectivity is achieved with different protocols. For more notes, computer networking and tutorials, visit.