How VPN Works

Virtual Private Network is the name of this technology. It is a remote connection technology that allows users to connect to a network “virtually”, as if they were physically plugged in. VPN allows remote workers to access office resources such as internal file shares and web portals without having to physically be in the office. This computer networking notes VPN guide will give you a quick overview of VPN.

Remote VPNs allow remote workers to connect. These are temporary connections or “dial-ins”. Microsoft Windows has PPTP (Point-to-Point Tunneling Protocol), which is a simple way to access the Internet. PPTP is a less desirable option because it relies on a weaker encryption protocol called MS-CHAP. IPSec is also available for remote VPNs with special client software and/or IPv6. SSL VPNs are increasingly popular as remote access VPNs. They provide a secure connection and make it easy for remote workers. Remote workers who use a SSL VPN can login to an HTTPS website that allows them download a client app (often Java). Clients can run the app after the initial installation without needing to log in to the website. SSL VPNs may also allow remote workers to access certain resources from the web portal without having to connect to the private network.

VPN can be used to hide the true identity of a host, in addition to granting remote workers access. VPN is a potential security risk, as it can be used to send classified data outside of the corporate LAN. Data loss prevention (DLP), firewall rules that do not allow outbound VPN connections, are good places to start, but SSL can be difficult to block accurately, as many secure websites use SSL. Subscribers can also subscribe to VPN services in order to mask a host’s IP.

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