What Is VPN Authentication?
Authentication is the process of confirming or proving the identity of a user and is of significant importance for VPNs. Because VPNs allow external entities to connect to and interact with a private network (or system), verifying the identity before granting access is paramount. VPN authentication takes place on two levels: connectivity and user.
When a VPN link starts, the hardware and software components at each endpoint must authenticate to establish the connection. Once the communication link begins, the user performs a separate and distinct authentication process. If either of these identity proofs fail, the VPN is severed.
The actual mechanism of authentication used in either case can vary. Options include ...
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