VPN Service | 5 |
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Virtual Private Network (VPN) is two or more computers or networks (nodes) connected by a private link of encrypted data. This link simulates a local connection, as if the remote computer were attached to the local area network (LAN).
VPNs allow users at home or otherwise away from the LAN to securely connect to it using any network connection, such as the Internet. From the user’s perspective, the VPN connection appears as a dedicated private link.
VPN technology also allows an organization to connect branch offices over the Internet, while maintaining secure communications. The VPN connection across the Internet acts as a wide area network (WAN) link between the sites.
VPNs have several advantages for organizations whose computer resources are physically separated. For example, each remote user or node uses the network resources of its Internet Service Provider (ISP) rather than having a direct, wired link to the main location. VPNs also allow verified mobile users to access private computer resources (file servers, etc.) from any connection to the Internet. Finally, VPN can link multiple LANs together over great distances using existing Internet infrastructure.
This chapter describes VPN authentication method, transport protocols, and how to configure, manage, and monitor VPN service. It does not include instructions for configuring VPN clients for use of your VPN server.
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