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VPN server software is a type of software that provides software-based VPN services within a VPN server.
It is the software component of the VPN server that is responsible for managing VPN connections, user/client authentication and management and other related services.
VPN server software is typically installed on a VPN server and manages its hardware and network components. It also manages the security and access control mechanism on the VPN server along with user/client management.
It provides VPN services on multiple communication protocols and technologies such as Point-to-Point Tunneling Protocol (PPTP), Secure Socket Layer VPN (SSL VPN), Layer 2 Tunneling Protocol (L2TP) and Internet Protocol Security (IPSec). The software can be used to create multiple forms of VPN connections and services such as site-to-site VPN or remote-access VPN.