Configuring the built-in Cisco IPSec VPN client in Mac OSX, iPad and iPhone

Here’s how to configure OSX,iPad,iPhone to use an enterprise Cisco VPN concentrator (which is what you connect to from internet when you want to virtually join a company or school’s LAN).

Open System Preferences –> Network –> click the plus sign (Create a new service). On the iPhone, choose Settings –> General –> Network –> VPN –> Add VPN Configuration. On the Mac, chose VPN as the interface. Choose Cisco IPSec as the VPN type, and supply a service name as a description (an arbitrary name for the connection, whatever makes sense to you).
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Cisco IPSec VPN Design (Networking Technology)

IPSec VPN Design (Networking Technology)
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Publisher: Cisco Press | ISBN: 1587051117 | edition 2005 | CHM | 384 pages | 8,87 mb
The definitive design and deployment guide for secure virtual private networks
* Learn about IPSec protocols and Cisco IOS IPSec packet processing
* Understand the differences between IPSec tunnel mode and transport mode
* Evaluate the IPSec features that improve VPN scalability and fault tolerance, such as dead peer detection and control plane keepalives
* Overcome the challenges of working with NAT and PMTUD
* Explore IPSec remote-access features, including extended authentication, mode-configuration, and digital certificates
* Examine the pros and cons of various IPSec connection models such as native IPSec, GRE, and remote access
* Apply fault tolerance methods to IPSec VPN designs
* Employ mechanisms to alleviate the configuration complexity of a large- scale IPSec VPN, including Tunnel End-Point Discovery (TED) and Dynamic Multipoint VPNs (DMVPN)
* Add services to IPSec VPNs, including voice and multicast
* Understand how network-based VPNs operate and how to integrate IPSec VPNs with MPLS VPNs.