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Network Security Principles and Practices by Saadat Malik

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IKE Enhancements for Remote-Access Client IPsec

Remote Access IPsec provided through VPN clients connecting to IPsec gateways is a very important IPsec scenario. However, remote-access clients provide some particularly difficult challenges for IKE. We will list these challenges first and then talk about how IKE has been extended to meet these challenges:

  • IPsec clients use unknown-to-gateway IP addresses to connect to the gateway, making it impossible to define unique address-based preshared keys. These are the IP addresses that have been assigned to these clients by their ISPs.

  • For the IPsec clients to be treated as part of the private network to which they are connected, they must enter the private network with known IP addresses and not the ...

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