Virtualized VPN Server: VPN Concentrator Software

Most businesses, enterprises, and other organizations use VPN software to allow mobile, remote, and home-office workers to connect privately and securely over the Internet to the corporate network-with all its associated services such as printers, file servers, Intranet services, and so on. The network function creates what is known as a VPN tunnel between the client and the business network that hides the private data stream from the rest of the world. It also hides the IP address and geographic location of the user from everyone else on the Internet.

The VNF employs such protocols as point-to-point protocol (PPP) for connectivity and communications. The VPN client (remote worker's computer) must first connect to the virtualized network element and authenticate (provide a username and password or use a certificate) before access can be established to the Corporate Network So to summarize the VPN concept, let's break it down...

Virtual... you have a private connection to another network which is built in software rather than a dedicated hardware (cabled/wired) link.

Private... all your communications are encrypted and hidden from everyone other than those with whom you want to communicate

Network...you can connect and communicate (network) with other computer resources and users (co-workers, clients, customers, and such).

In summary, a Virtual Private Network is a secure virtual connection established over an unsecure public network such as the Internet.

VPN server software is sometimes created using the open source software model, which allows a community of software developers to modify and enhance the software functionality. Such entities may be referred to as an Open VPN Server or an Open VPN Access Server. The term Security Gateway may also be used to refer to a VPN Access Server.

VPN Concentrator
For large organizations, especially those with two or more geographically separated work sites, a standard VPN server cannot support the number of connections required, nor can it handle the volume of traffic generated by thousands of workforce users. In such cases a VPN concentrator (a.k.a. VPN aggregator) is necessary. VPN concentrators can create and manage thousands of VPN tunnels concurrently. So, in site-to-site VPN architectures, VPN concentrators are typically employed. In the traditional hardware-based approach, a separate VPN concentrator appliance is installed at each major office, while each small, home, and remote office also requires a local unit. Patton's virtual network function can be configured to operate as a virtual VPN concentrator to provide all the same capabilities as a traditional VPN concentrator appliance. Cloud-based network orchestration, offers the multiple advantages of managed scalability for the number of tunnels required and overall traffic capacity-which can all be remotely managed, scheduled, and even automated.

Virtualization technology combined with using cloud-based network-edge orchestration offers several valuable benefits, beginning with touchless, automated service deployment and activation. Whether virtualized and delivered in the cloud, or downloaded for operation on bare metal virtual customer premise equipment (vCPE), VPN router capacity and service equality can be automated and scheduled, based on forecasted demand. By removing the limitations of a dedicated hardware appliance, Virtualization technology offers increased reliability and higher network availability.

VPN Service Providers can profit by using the virtual SmartNode (vSN) VPN server to deliver secure, encrypted VPN service to subscribers. Because it is based on NFV technology, the number of subscribers and the quality of service for each subscriber can be easily scaled up (increased), scaled down (decreased), monitored, managed.

Edge Orchestration
Whether the virtualized VPN software is delivered in the cloud or downloaded and installed on a bare-metal universal CPE (uCPE) at the subscriber premise, Network Edge Orchestration (a.k.a. intelligent edge) is typically required to activate, configure, scale (up or down), monitor and control VNF-based virtualized VPN software service and VPN network implementation.

Virtual VPN Server Terminology
Short Glossary of Related Acronyms
VPN - Virtual Private Network
uCPE - Universal CPE
vCPE - Virtual CPE
NFV - Network Function Virtualization
VNF - Virtualized Network Function
SDN - Software Defined Networking
VM - Virtual Machine
CPE - Customer Premise Equipment
IaaS - Infrastructure as a Service
SaaS - Software as a Service

Common Virtual VPN Server Synonyms and related terms
VPN software
VPN server software
Virtual Network Software
Virtual server
Virtual private Network VPN Software
Virtual private server
VPN Concentrator
VPN Aggregator
OpenVPN Server
OpenVPN Access Server
Security Gateway
Cloud services
Secure connection software
Virtual Network Router
Whitebox CPE
Bare Metal CPE
NFV CPE Virtual Operating System
Virtualization Technology
Virtual System
VMS software
Virtual Network
Hypervisor Cloud Computing
Server Virtualization

VPN Server

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