Types of VPN
There are primarily two types of VPNs: Site-to-site VPNs and Remote-based VPNs. Let’s take a look at each of them in detail.
This type of VPN is perfect for businesses that have offices in multiple locations. With site-to-site VPN, employees from one office can easily and securely send and receive data with employees sitting at a different geographical location over the Internet.
There are two types of site-to-site VPNs:
Intranet-based: If a business has multiple remote locations and wants to join them in a single private network, they can create an intranet-based VPN to connect each independent LAN to a single WAN.
Extranet-based: If a business wants to communicate and work together in a secure, shared environment with another organization such as a supplier or partner, they can create an extranet-based VPN by connecting those companies’ LANs.
This VPN enables individual users to connect and communicate securely with a remote computer network. This is mostly used in large-sized enterprises that have a large number of salespeople working in the field who need to access the company network regularly.
Remote-access VPNs come in two forms. One is a network access server (NAS), which is a dedicated server, or an application running on a shared server. In this case, users need to connect to the NAS over the Internet to access the VPN. Users key in their credentials to access the VPN, which is validated by the NAS either by using a separate authentication server or its own authentication process.
The other form is client software installed on the user’s computer or smartphone to access the VPN. The software sets up an encrypted connection to the NAS, which the user accesses by its IP address.
Several types of VPN protocols fall into these two broad categories such as PPTP, L2TP, IPSec, SSL, MPLS, Hybrid, SSTP, and OpenVPN.