Windows 7 / Networking

Understanding IKEv2

Internet Key Exchange (IKE) is a key protocol within the Internet Protocol security (IPsec) protocol suite. IKEv1 can be used to set up SAs that enable secure, encrypted communications over a VPN connection. To do this, IKE uses a Diffie-Hellman key exchange to set up a shared session secret from which cryptographic keys are then derived. Public or pre-shared keys can then be used to mutually authenticate the endpoints of the VPN connection. IKEv1 is supported on Windows Vista, Windows Server 2003, and earlier versions of Windows.

IKEv2 is a newer version of IKE that is supported on Windows 7 and Windows Server 2008 R2. IKEv2 includes a number of improvements over IKEv1, including the following:

  • A simplified initial exchange of messages that reduces latency and increases connection establishment speed
  • Improved reliability through the use of sequence numbers, acknowledgements, and error correction
  • Support for Extensible Authentication Protocol (EAP) as a method for authenticating VPN endpoints
  • Backward compatibility with the ports used by IKEv1 to ensure Network Address Translation (NAT) traversal
  • VPN mobility support using the MOBIKE extension
  • Support for the IPv6 protocol
  • Other features that provide improved speed, security, and ease of configuration when compared with IKEv1

Support for IKEv2 as a VPN tunneling protocol is new in Windows 7 and Windows Server 2008 R2, and IKEv2 is a key enabler of the new VPN Reconnect feature of these platforms. For more information on VPN Reconnect, see the section titled "Understanding VPN Reconnect" later in this tutorial.

More Info For more information concerning IKEv2, see RFC 4306 at

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In this tutorial:

  1. Connecting Remote Users and Networks
  2. Enhancements for Connecting Remote Users and Networks in Windows 7
  3. Understanding IKEv2
  4. Understanding MOBIKE
  5. Understanding VPN Reconnect
  6. Protocols and Features of VPN Reconnect
  7. How VPN Reconnect Works
  8. Understanding DirectAccess
  9. Benefits of DirectAccess
  10. How DirectAccess Works
  11. Windows 7 and Windows Server 2008 R2
  12. Ipv6
  13. IPsec
  14. Perimeter Firewall Exceptions
  15. Implementing DirectAccess
  16. Understanding BranchCache
  17. Benefits of BranchCache
  18. How BranchCache Works
  19. Protocols Supported by BranchCache
  20. Implementing BranchCache
  21. Supported Connection Types
  22. Outgoing Connection Types
  23. Incoming Connection Types
  24. Deprecated Connection Types
  25. Supported Tunneling Protocols
  26. Comparing the Different Tunneling Protocols
  27. Understanding Cryptographic Enhancements
  28. Support for AES
  29. Weak Cryptography Removal from PP TP/L2TP
  30. Supported Authentication Protocols
  31. Understanding the VPN Connection Negotiation Process
  32. Creating and Configuring VPN Connection
  33. Creating a VPN Connection
  34. Initiating a Connection
  35. Terminating a Connection
  36. Viewing Connection Details
  37. Configuring a VPN Connection
  38. Configuring Security Settings for a VPN Connection
  39. Configuring the Tunneling Protocol (s) Used
  40. Configuring Advanced Connection Settings
  41. Configuring the Data Encryption Level
  42. Configuring the Authentication Method Used
  43. Configuring Authentication for IKEv2 connections
  44. Configuring Mobility for IKEv2 Connections
  45. Configuring Dial-Up Connections
  46. Creating a Dial-Up Connection
  47. Advanced Connection Settings
  48. Configuring Incoming Connections
  49. Managing Connections Using Group Policy
  50. Using Remote Desktop
  51. Understanding Remote Desktop
  52. Versions of RDP
  53. RDP 6.1 Features and Enhancements
  54. RDP 7.0 new features and enhancements
  55. RemoteApp and Desktop Connection
  56. Understanding RDC
  57. Understanding Remote Desktop Services Terminology
  58. Configuring and Using Remote Desktop
  59. Enabling Remote Desktop and Authorizing Users on a Single Computer
  60. Enabling Remote Desktop Using Group Policy
  61. Configuring and Deploying Remote Desktop Connection
  62. Configuring Remote Desktop Connection from the Command Line
  63. Configuring Remote Desktop Connection Using Notepad
  64. Configuring Remote Desktop Using Group Policy
  65. Establishing a Remote Desktop Session
  66. Improving Remote Desktop Performance
  67. Troubleshooting Remote Desktop Sessions
  68. Configuring and Using RemoteApp and Desktop Connection