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Mastering OpenVPN by Jan Just Keijser, Eric F Crist

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Comparison of VPNs

Each of the different VPN technologies has its own characteristics, advantages, and disadvantages. Even though this book is about OpenVPN, there are use-cases where, for example, an IPSec-based VPN is more suitable, depending on the requirement of the users.

Advantages and disadvantages of PPTP

The main advantage of PPTP-based VPNs is that the VPN client software is built into most operating systems. Also, the startup time for configuring and initializing a PPTP VPN connection is quite short.

Disadvantages of PPTP-based VPNs are the lack of security and the lack of configuration options on both the client and server side. Furthermore, the EAP-TLS extension that enables the use of X.509 certificates is fully supported only on Microsoft ...

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