In this lab scenario we will Configure a Site-to-Site IPSec VPN Using Pre-Shared Keys between two already configured routers. This lab has been created using Cisco Packet Tracer but can easily be done with GNS3 or real hardware.
A VPN (Virtual Private Network) is a network that uses primarily public telecommunication infrastructure, such as the Internet, to provide remote offices or traveling user’s access to a central organizational network.
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VPNs typically require remote users of the network to be authenticated, and often secure data with encryption technologies to prevent disclosure of private information to unauthorized parties. VPN can be built upon IPSec or Secure Socket Layer (SSL). These are two fundamentally different approaches for building VPNs
VPNs may serve any network functionality that is found on any network, such as sharing of data and access to network resources, printers, databases, websites, etc. A VPN user typically experiences the central network in a manner that is identical to being connected directly to the central network. VPN technology via the public Internet has replaced the need to requisition and maintain expensive dedicated leased-line telecommunication circuits once typical in wide-area network installations.
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Basic IPSec VPN (362.5 KiB, 4,315 hits) Packet Tracer 5-3-3 By Cisco (48.3 MiB, 1,934 hits)
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