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L2TP/IPSec

Layer 2 tunneling protocol (L2TP) doesn’t actually provide any encryption or authentication – it’s simply a VPN tunneling protocol that creates a connection between you and a VPN server. It relies on the other tools in the IPSec suite to encrypt your traffic and keep it private and secure. This protocol has a few convenient features, but certain issues prevent it from being a leading VPN protocol.

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SSTP

Secure Socket Tunneling Protocol (SSTP) is a fairly secure and capable VPN protocol created by Microsoft. It has its upsides and downsides, meaning that each user has to decide for themselves whether this protocol is worth using it. Despite being a primarily Microsoft product, SSTP is available on other systems besides Windows.

WireGuard

WireGuard

WireGuard is the newest and fastest tunneling protocol the entire VPN industry is talking about. It uses state-of-the-art cryptography that outshines the current leaders – OpenVPN and IPSec/IKEv2. However, it’s still considered experimental, so VPN providers need to look for new solutions to overcome WireGuard’s vulnerabilities.

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IPSec/IKEv2

IKEv2 sets the foundation for a secure VPN connection by establishing an authenticated and encrypted connection. It was developed by Microsoft and Cisco to be fast, stable, and secure. It succeeds on all of these fronts, but where it really shines is its stability. As part of the IPSec internet security toolbox, IKEv2 uses other IPSec tools to provide comprehensive VPN coverage.

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OpenVPN

OpenVPN is a very popular and highly secure protocol used by many VPN providers. It runs on either the TCP or UDP internet protocol. The former will guarantee that your data will be delivered in full and in the right order while the latter will focus on faster speeds.