Overview of VPN Technologies

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Richard S


Date added:

July 5, 2014








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Microsoft supports the IETF efforts to standardize VPN technology. To date, two major technologies are IETF standards: ? Layer Two Tunneling Protocol (L2TP)?a combination of PPTP and Cisco's Layer 2 Forwarding, which evolved through the IETF standards process. ? Internet Protocol Security (IPSec)?an architecture, protocol, and related Internet Key Exchange (IKE) protocol, which are described by IETF RFCs 2401-2409...
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However, IPSec tunnel mode by itself does support legacy authentication methods, tunnel IP address assignment and configuration, and multiple protocols?all critical requirements for remote access VPN connections. To provide a truly interoperable solution, Windows Server 2003 uses L2TP in combination with IPSec to provide an interoperable, secure VPN solution...
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